Reverse array in php
http://php.net/manual/en/function.array-reverse.php:
$newArray = array_reverse($theArray, true);
The important part is the true parameter, which preserves the keys.
Not convinced? You can see it in action on this codepad exampole.
foreach($array as $arr){
array_unshift($array, $arr);
array_pop($array);
}