Convert regular wp_nav_menu into select element
###Put this into functions.php file
/**
* SelectBox box menu walker
* @author : Dmitry Tokmakov
* @version : 1.0
*
*/
class SelectBox_Menu_Walker extends Walker_Nav_Menu {
function start_el( &$output, $item, $depth = 0, $args = array(), $id = 0 ) {
global $wp_query;
$indent = ( $depth ) ? str_repeat( "\t", $depth ) : '';
$classes = empty( $item->classes ) ? array() : (array) $item->classes;
$selected = in_array('current-menu-item',$classes) ? 'selected="selected"' : '';
$output .= '<option '.$selected.' value="'.$item->url.'">';
$output .= $item->title;
}
function end_el( &$output, $item, $depth = 0, $args = array() ) {
$output .= "</option>";
}
}###Usage
wp_nav_menu( array(
'theme_location' => 'mobile',
'walker' => new SelectBox_Menu_Walker(),
'items_wrap' => '<div class="mobile-menu"><form><select onchange="if (this.value) window.location.href=this.value">%3$s</select></form></div>',
) );