public function getParentCategory($categoryId, $siteId = 1)
{
$table = 'catalog_category_website';
$linker = 'catalog_category';
$joinString = $table . '.parent_category_id = ' . $linker . '.category_id';
$where = new \Zend\Db\Sql\Where();
$where->equalTo('website_id', $siteId);
$where->equalTo($table . '.category_id', $categoryId);
$where->isNotNull($table . '.parent_category_id');
$select = $this->getSelect($table)->join($linker, $joinString)->where($where);
return $this->selectOneModel($select);
}