Creates a shortcode called 'post_custom_tax' that accepts a custom taxonomy as a variable

Genesis Custom Taxonomy Shortcode

<?php 

add_shortcode( 'post_custom_tax', 'jw_post_custom_taxonomy_shortcode' );
/**
 * Produces the custom taxonomy terms links list.
 *
 * Supported shortcode attributes are:
 *	 taxonomy (taxonomy to list, default is category),
 *   after (output after link, default is empty string),
 *   before (output before links, default is 'Filed Under: '),
 *   sep (separator string between tags, default is ', ').		
 *
 * Output passes through 'jw_post_custom_taxonomy_shortcode' filter before returning.
 *
 *
 * @param array|string $atts Shortcode attributes.
 * @return string Shortcode output
 */
function jw_post_custom_taxonomy_shortcode( $atts ) {

	$defaults = array(
		'taxonomy'    => 'category',
		'sep'    => ', ',
		'before' => __( 'Filed Under: ', 'swellfire' ),
		'after'  => ''
	);
  
 	$atts = shortcode_atts( $defaults, $atts, 'post_custom_tax' );

	$terms = wp_get_post_terms( get_the_ID(), $atts[ 'taxonomy' ] );
	 
	if ( !empty( $terms ) && !is_wp_error( $terms ) ){
		$count = count( $terms );
		$i = 0;
		
		
		$post_meta .= '<span class="categories">';
		$post_meta .= $atts['before'];

		foreach ( $terms as $term ) {
			$i++;
			$term_link = get_term_link( $term, $atts[ 'taxonomy' ] );
			$post_meta.= '<a href="' . $term_link . '" >' . $term->name . '</a>' ;
			if ($count != $i) {
        		$post_meta .= $atts['sep'];
	        }

		}

		$post_meta .= '</span>';
	}

	return apply_filters( 'jw_post_custom_taxonomy_shortcode', $post_meta, $atts );

}