<smil xmlns="http://www.w3.org/ns/SMIL" version="3.0"> <body> <seq> <?php foreach ( $attachments as $attachment ): echo "\n\t" . Playlist_Maker::get_XML_element( 'ref' , array( 'src' => wp_get_attachment_url($attachment->ID) , 'title' => $attachment->post_title , 'type' => $attachment->post_mime_type )); endforeach; ?> </seq> </body> </smil>