gistfile1.txt

$project_metaboxes->add_field( array(
	'id'          => $prefix . 'bundle_items',
	'type'        => 'group',
	'options'     => array(
		'group_title'   => __( 'Bundle Item {#}', 'project' ),
		'add_button'    => __( 'Add Bundle Item', 'project' ),
		'remove_butaton' => __( 'Remove Bundle Item', 'project' ),
		'sortable'      => false,
	),

	// Add repeatable bundle item fields
	'fields' => array(
		array(
			'name' => __( 'Bundle Item Title', 'project' ),
			'id'   => 'bundle_item_title',
			'type' => 'text',
		),

		array(
			'name' => __( 'Bundle Item Image', 'project' ),
			'id'   => 'bundle_item_image',
			'type' => 'file',
		),

		array(
			'name'         => __( 'Bundle Item Images', 'project' ),
			'id'           => 'bundle_item_images',
			'preview_size' => array( 100, 100 ),
			'type'         => 'file_list',
		),

		array(
			'name' => __( 'Bundle Item Description', 'project' ),
			'description' => __( 'Short description to be displayed on homepage.', 'project' ),
			'id'   => 'bundle_item_description',
			'type' => 'textarea_small',
		),

		array(
			'name' => __( 'Feature on Homepage', 'project' ),
			'desc' => __( 'Feature this item's image and description on the homepage.', 'project' ),
			'id'   => 'bundle_featured_item',
			'type' => 'checkbox'
		),
	),
) );