public function insertBreadcrumbs(array $values)
    {
        if (empty($values)) {
            return;
        }

        if ($this->Breadcrumbs instanceof XMLElement && count($this->Breadcrumbs->getChildrenByName('nav')) === 1) {
            $nav = $this->Breadcrumbs->getChildrenByName('nav');
            $nav = $nav[0];

            $p = $nav->getChild(0);
        } else {
            $p = new XMLElement('p');
            $nav = new XMLElement('nav');
            $nav->appendChild($p);

            $this->Breadcrumbs->prependChild($nav);
        }

        foreach ($values as $v) {
            $p->appendChild($v);
            $p->appendChild(new XMLElement('span', '&#8250;', array('class' => 'sep')));
        }
    }