function _order_result($result, $order = '', $asc = true)
{
	if (empty($order) || !isset($result[0][$order])) return $result;
	
	$array  = array();
	$output = array();
	
	for ($i = 0; $i < count($result); $i++) {
	
		$array["$i"] = $result[$i][$order];
	
	}
	
	if ($asc) {
	
		asort($array);
		
	} else {
	
		arsort($array);
	
	}
	
	reset($array);
	
	while (list($key, $value) = each($array)) {
		
		$i        = intval($key);
		
		$output[] = $result[$i];
	
	}
	
	return $output;

}

array(
  array(
    'name' => 'thomas',
    'alter' => '37',
    'wohnort' => 'koeln'
  ),
  array(
    'name' => 'dieter',
    'alter' => '41',
    'wohnort' => 'hamburg'
  )
);

$sortiert = _order_result($array, 'alter', false);

<?
function _order_result($result, $order = '', $asc = true) 
{ 
   if (empty($order) || !isset($result[0][$order])) return $result; 
    
   $array  = array(); 
   $output = array(); 
    
   for ($i = 0; $i < count($result); $i++) { 
    
      $array["$i"] = $result[$i][$order]; 
    
   } 
    
   if ($asc) { 
    
      asort($array); 
       
   } else { 
    
      arsort($array); 
    
   } 
    
   reset($array); 
    
   while (list($key, $value) = each($array)) { 
       
      $i        = intval($key); 
       
      $output[] = $result[$i]; 
    
   } 
    
   return $output; 

}
?>





<?php
$fruits = array (
"Obst" => array ("Orange","Banane","Apfel"),
"Zahlen" => array (4, 5, 6,1,2,3),
"Werte" => array ("erstes", "zweites", "drittes")
);

$sortiert = _order_result($fruits, 'Zahlen', false);


print_r($sortiert);

?>