Woocommerce - output product variations in tab.php

<?php
// Add to functions.php

/*===================================================
    
    Created by sk from Renegade Empire with help 
    from these sources:
    
    http://docs.woothemes.com/document/editing-product-data-tabs/
    http://www.sean-barton.co.uk/2013/03/remove-woocommerce-20-reviews-tab/#.UYnWe7XfB6N
    http://www.sean-barton.co.uk/2013/03/sb-add-woocommerce-tabs-wordpress-plugin/#.UYrYL7XfB6M

====================================================*/



/*===================================================   
    Options
====================================================*/

$re_wcvt_options = array(
    'tab_title' =>              'Product Variations',   // change the tile of the tab
    'sku_title' =>              'REF #',                // change the sku column heading
    'show_price' =>             'yes',                  // show price column: yes or no
    'show_description' =>       'yes',                  // show description column: yes or no
    'tab_priority' =>           '5',                    // 5 is good to make the tab appear first
);


/*===================================================   
    Add the tab
====================================================*/


add_filter( 'woocommerce_product_tabs', 're_woo_product_variations_tab' );
function re_woo_product_variations_tab() {

	global $woocommerce, $product, $post, $re_wcvt_options;
    // $available_variations = $product->get_available_variations();
    // $attributes = $product->get_attributes();
    if (is_product() and $product->product_type == 'variable') {
	
		// Adds the new tab
		
		$tabs['variations_table'] = array(
			'title' 	=> __( $re_wcvt_options['tab_title'], 'woocommerce' ),
			'priority' 	=> 50,
			'callback' 	=> 're_woo_product_variations_tab_content'
		);
	 
		return $tabs;
	}
 
}

/*===================================================   
    Build the tab content
====================================================*/

function re_woo_product_variations_tab_content() {

	global $woocommerce, $product, $post, $re_wcvt_options;
    $available_variations = $product->get_available_variations();
    $attributes = $product->get_attributes();
 
	// The new tab content
 	
	//echo '<h2>Product Variations</h2>';
	//echo '<p>Here\'s your new product tab.</p>';
    
?>
            <table class="table table-striped table-hover table-bordered varations-table tablesorter">
                <thead>
                    <tr>
                        <th><?php echo $re_wcvt_options['sku_title']; ?></th>
                    <?php 
                        // Show description if option is set to yes
                        if ($re_wcvt_options['show_description'] == 'yes') : ?>
                        <th>Description</th>
                    <?php endif; ?>
                    <?php foreach ( $attributes as $name => $options) :?>
                        <th>
                        <?php 
                            //echo $woocommerce->attribute_label($name); 
                            $attr_name = $options['name'];
                            if (0 === strpos($attr_name, 'pa_')){
                                $attr_name = wc_attribute_label($attr_name);
                            }
                            echo $attr_name;
                        ?>
                        </th>
                    <?php endforeach;?>
                    <?php 
                        // Show price if option is set to yes
                        if ($re_wcvt_options['show_price'] == 'yes') : ?>
                        <th>Price</th>
                    <?php endif; ?>
                        <th class="var-qty">&nbsp;</th>
                        <th class="var-add-to-cart">&nbsp;</th>
                    </tr>
                </thead>
                <tbody>
                <?php
                    /*
                    echo '<pre>';
                    print_r($re_wcvt_options);
                    echo '</pre>';
                    */
                ?>
                <?php foreach ($available_variations as $prod_variation) : ?>
                    <?php
                        // get some vars to work with
                       	$post_id = $prod_variation['variation_id'];
                        $post_object = get_post($post_id);
                        
                         
                        //echo '<pre>';
                        //print_r($prod_variation);
                        //echo '</pre>';
                        
                    ?>
                    <tr>
                        <td>
                            <?php 
                            	// echo substr($prod_variation['sku'], 5, 100) ; // output SKU but trim the first part that is added 
                            	echo $prod_variation['sku'];
                            ?>
                        </td>
                    <?php 
                    // Show description if option is set to yes
                    if ($re_wcvt_options['show_description'] == 'yes') : ?>
                        <td>
                        <?php 
                            $variation_desc = get_post_meta( $post_object->ID, '_description', true);
                            if ( !empty($post_object->post_content)){
                                $variation_desc = $post_object->post_content; // post content 
                            } elseif (!empty($variation_desc)) {
                                $variation_desc = get_post_meta( $post_object->ID, '_description', true); // get meta description
                            } else {
                                $variation_desc = get_the_title($product->id); // parent title
                            }
                            echo $variation_desc;
                        ?>
                        </td>
                    <?php endif; ?>
                    <?php foreach ($prod_variation['attributes'] as $attr_name => $attr_value) : ?>
                        <td>
                        <?php
                            // Get the correct variation values
                            if (strpos($attr_name, '_pa_')){ // variation is a pre-definted attribute
                                $attr_name = substr($attr_name, 10);
                                $attr = get_term_by('slug', $attr_value, $attr_name);
                                $attr_value = $attr->name;
                            } else { // variation is a custom attribute
                                //$attr = maybe_unserialize( get_post_meta( $post->ID, '_product_attributes' ) );
                                //$attr_value = var_dump($attr);
                                
                                //$attr = get_term_by('slug', $attr_value, $attr_name);
                                //$attr_value = $attr->name;
                            }
                            echo $attr_value;
                        ?>
                        </td>
                    <?php endforeach;?>
                    <?php 
                        // Show price if option is set to yes
                        if ($re_wcvt_options['show_price'] == 'yes') : ?>
                        <td><?php echo get_woocommerce_currency_symbol() . get_post_meta( $post_object->ID, '_price', true); ?></td>
                    <?php endif; ?>
                    	<form action="<?php echo do_shortcode('[add_to_cart_url id="'.$product->id.'"]'); ?>" class="variations_form cart" method="post" enctype="multipart/form-data" data-product_id="<?php echo $product->id; ?>">
                        <td>
                            <?php woocommerce_quantity_input(); ?>
                        </td>
                        <td>
                                <input type="hidden" name="variation_id" value="<?php echo $post_id; ?>">
                                    <?php foreach ($prod_variation['attributes'] as $attr_name => $attr_value) : ?>
                                        <input type="hidden" name="<?php echo sanitize_title($attr_name); ?>" value="<?php echo $attr_value ;?>">
                                    <?php endforeach;?>                                     
                                <button type="submit" class="btn btn-small button add-to" type="button">Add to cart</button>
                            
                        </td>
                        </form>
                    </tr>
                <?php endforeach;?>
                </tbody>
            </table>

            <?php
                //echo '<pre>';
                //print_r($prod_variation['attributes']); 
                //echo '</pre>';
            ?>
<?php
}

/*===================================================   
    Tab Position
====================================================*/


add_filter( 'woocommerce_product_tabs', 're_woo_move_variation_table_tab', 98);
function re_woo_move_variation_table_tab($tabs) {
    global $re_wcvt_options;
    if ($tabs['variations_table']) {
        $tabs['variations_table']['priority'] = $re_wcvt_options['tab_priority'];
    }
    return $tabs;
}

The add to cart not working so added this below the submit button to make it work:
<input type="hidden" name="add-to-cart" value="<?php echo absint( $product->get_id() ); ?>" /> <input type="hidden" name="product_id" value="<?php echo absint( $product->get_id() ); ?>" /> <input type="hidden" name="variation_id" class="variation_id" value="0" />