public function filterBreadcrumb()
    {
        $nodeList = $this->xp->query('//li[ contains(@class, "open") or contains(@class, "active")]');
        if (0 !== $nodeList->length) {
            $ul = $this->dom->createElement('ul');
            foreach ($nodeList as $node) {
                $li = $this->dom->createElement('li');
                $li->appendChild($node->firstChild);
                $ul->appendChild($li);
            }

            return $ul;
        }
    }