'Images', // 'desc' => 'A description for the field.', // description 'id' => $prefix . 'images', // field id and name 'type' => 'repeatable', // type of field 'sanitizer' => array( // array of sanitizers with matching keys to next array 'featured' => 'meta_box_santitize_boolean', 'title' => 'sanitize_text_field', 'desc' => 'wp_kses_data' ), 'repeatable_fields' => array ( // array of fields to be repeated array( // Image ID field 'label' => 'Image', // 'id' => 'image', // field id and name 'type' => 'image' // type of field ) ) ) ); /** * Instantiate the class with all variables to create a meta box * var $id string meta box id * var $title string title * var $fields array fields * var $page string|array post type to add meta box to * var $js bool including javascript or not */ $gallery_meta_box = new custom_add_meta_box( 'gallery_content', 'Gallery Images', $fields, 'artistpress-gallery', true );