public static function buildMenu( ADT_Tree_Menu_List $tree, $contentDrop = NULL, $attributes = array() )
	{
		$list	= array();
		foreach( $tree->getChildren() as $child )
			$list[]	= self::buildItemWithChildren( $child, 1, $contentDrop );
		return UI_HTML_Elements::unorderedList( $list, 1, $attributes );
	}