public static function navList($items, $htmlOptions = array())
    {
        foreach ($items as $i => $itemOptions) {
            if (is_string($itemOptions)) {
                continue;
            }
            if (!isset($itemOptions['url']) && !isset($itemOptions['items'])) {
                $label = TbArray::popValue('label', $itemOptions, '');
                $items[$i] = self::menuHeader($label, $itemOptions);
            }
        }
        return self::nav(self::NAV_TYPE_LIST, $items, $htmlOptions);
    }