public function addMulti($title, $list, $class=NULL) {

		$multi 			= new \stdClass();
		$multi->type	= 'multi';
		$multi->title	= $title;
		$multi->class	= $class;
		$multi->list	= array();
		foreach ($list as $i) {
			$multi->list[]	= $i;
		}

		$this->items[] = $multi;

	}