/**
  * Need to wrap UL element is extra DIVs
  *
  * @return string
  **/
 protected function ul($html, $depth)
 {
     $output = parent::ul($html, $depth);
     $output = "<div class=\"bd\">{$output}</div>\n";
     if ($depth != 0) {
         // Cannot have this div on root list
         $output = "<div class=\"yuimenu\">{$output}</div>";
     }
     return $output;
 }