function get($params = array()) {

    $limit          = isset($params['limit']) ? $params['limit'] : false;
    $order          = isset($params['order']) ? $params['order'] : 'position ASC';
    $id             = isset($params['id']) ? $params['id'] : false;
    $parent_id      = isset($params['parent_id']) ? $params['parent_id'] : false;

    $sql            = "SELECT * FROM ".$this->tb." WHERE name != '' ";

    $sql            .= $id ?  "AND id = '".$id."' " : "";
    $sql            .= $parent_id ?  "AND parent_id = '".$parent_id."' " : "";
    $sql            .= $order ? "ORDER BY ".$order." " : "";
    $sql            .= $limit ? "LIMIT ".$limit." " : "";

    $data           = $this->db->query($sql)->result_array();

    return          $id ? $data[0] : $this->_index($data);
}