protected function setBreadcrumbEditCollectionItem()
    {
        $breadcrumbs = array();

        $breadcrumbs[] = array(
            'url' => $this->url('admin'),
            'text' => $this->text('Dashboard')
        );

        $breadcrumbs[] = array(
            'url' => $this->url('admin/content/collection'),
            'text' => $this->text('Collections')
        );

        $breadcrumbs[] = array(
            'url' => $this->url("admin/content/collection-item/{$this->data_collection['collection_id']}"),
            'text' => $this->text('Items of collection %name', array('%name' => $this->data_collection['title']))
        );

        $this->setBreadcrumbs($breadcrumbs);
    }