<?php
$data=array(
0=>array('one'=>34,'two'=>'d'),
1=>array('one'=>45,'two'=>'e'),
2=>array('one'=>47,'two'=>'h'),
3=>array('one'=>12,'two'=>'c'),
4=>array('one'=>15,'two'=>'w'),
5=>array('one'=>85,'two'=>'r'),
);
foreach($data as $val){
$key_arrays[]=$val['one'];
}
array_multisort($key_arrays,SORT_ASC,SORT_NUMERIC,$data);
var_dump($data);

array
 0 => 
  array
   'one' => int 12
   'two' => string 'c' (length=1)
 1 => 
  array
   'one' => int 15
   'two' => string 'w' (length=1)
 2 => 
  array
   'one' => int 34
   'two' => string 'd' (length=1)
 3 => 
  array
   'one' => int 45
   'two' => string 'e' (length=1)
 4 => 
  array
   'one' => int 47
   'two' => string 'h' (length=1)
 5 => 
  array
   'one' => int 85
   'two' => string 'r' (length=1)

function my_array_multisort($data,$sort_order_field,$sort_order=SORT_ASC,$sort_type=SORT_NUMERIC){
foreach($data as $val){
$key_arrays[]=$val[$sort_order_field];
}
array_multisort($key_arrays,SORT_ASC,SORT_NUMERIC,$data);
rturn $data;
}