GravityView - Convert links to anchors in List field output

gravityview-convert-list-of-links-to-anchors.php

<?php

add_filter( 'gravityview_field_entry_value_list', 'gravityview_convert_list_items_to_links', 10, 4 );

/**
 * If there are URLs in a List field, convert them to links. Otherwise, display the original value.
 * 
 * @param string $output HTML value output
 * @param array  $entry The GF entry array
 * @param  array $field_settings Settings for the particular GV field
 * @param array $field The current field being processed (also exists in $field_settings)
 */
function gravityview_convert_list_items_to_links( $output, $entry, $field_settings, $field ) {

	$return = $output;

	// Raw value
	$values = unserialize( $field['value'] );

	$items = array();
	foreach ( $values as $value ) {
		$items[] = GFCommon::is_valid_url( $value ) ? '<a href="'. esc_url( $value ). '" target="_blank">'. $value .'</a>' : $value;
	}

	// Generate HTML if items exist
	if( !empty( $items ) ) {
		$return = '<ul class="bulleted"><li>'.implode('</li><li>', $items ).'</li></ul>';
	}

	return $return;
}