php sort array

sort_array.php

<?php

$tableau = array(
	"id_cat4" => array(
		"zom_cat1",
		"éom_cat1" => array(
			"nom_elem3" => "description_elem1",
			"nom_elem2" => "description_elem2",
			"nom_elem1" => "description_elem2"
		),

		"éom_cat3" => array(
			"nom_elem3" => "description_elem1",
			"nom_elem2" => "description_elem2",
			"nom_elem1" => "description_elem2"
		),

		"2om_cat1" => array(
			"nom_elem3" => "description_elem1",
			"nom_elem2" => "description_elem2",
			"nom_elem1" => "description_elem2"
		)
	),


	"id_cat2" => array(
		"éom_cat1" => array(
			"nom_elem3" => "description_elem1",
			"nom_elem2" => "description_elem2",
			"nom_elem1" => "description_elem2"
		),

		"éom_cat3" => array(
			"nom_elem3" => "description_elem1",
			"nom_elem2" => "description_elem2",
			"nom_elem1" => "description_elem2"
		),

		"2om_cat1" => array(
			"nom_elem3" => "description_elem1",
			"nom_elem2" => "description_elem2",
			"nom_elem1" => "description_elem2"
		)
	),


);


function recur_ksort(&$array) {
   foreach ($array as &$value) {
      if (is_array($value)) recur_ksort($value);
   }
   return ksort($array, SORT_LOCALE_STRING);
}

recur_ksort($tableau);

var_dump($tableau);