I have an associative array, but I want to sort order them by the 'cat_name
$test = Array
(
[0] => Array
(
[cat_id] => 5
[cat_name] => Resolution
)
[1] => Array
(
[cat_id] => 6
[cat_name] => Speed
)
[2] => Array
(
[cat_id] => 7
[cat_name] => Accuracy
)
)
When I do sort($test), it sorts the array in order of 'cat_id', how do I sort it by 'cat_name'?