WooCommerce tabs using Advanced Custom Fields

woocommerce-acf-tabs

// First create a field group assigned to the Product custom post type
// Make a repeater field with sub-fields "Title" (text) and "Content" (WYSIWYG)

add_filter( 'woocommerce_product_tabs', 'custom_tabs' );
function custom_tabs( $tabs ) {
	global $post;
	
	$priority = 100;
	while ( has_sub_field( 'tabs', $post->ID ) ) {
		$title = get_sub_field( 'title' );
		$content = get_sub_field( 'content' );
		$id = sanitize_title( $title );
		$id = str_replace( '-', '_', $id );

		$tabs[ $id ] = array(
			'title' 	=> $title,
			'priority' 	=> $priority++,
			'callback' 	=> 'custom_tab_content'
		);
	}
	
	return $tabs;
}


function custom_tab_content( $id ) {
	global $post;
	while ( has_sub_field( 'tabs', $post->ID ) ) {
		$title = get_sub_field( 'title' );
		$this_id = sanitize_title( $title );
		$this_ = str_replace( '-', '_', $this_ );
		if ( $id == $this_id ) {
			the_sub_field( 'content' );
		}
	}
}

Just if anyone had a problem with this script. On line 31:
$this_ = str_replace( '-', '', $this ); is missing the id at the end:
$this_id = str_replace( '-', '_', $this_id );