$departements = array();
foreach ($_POST as $nomVariableCheckbox => $idCheckbox) {
	//echo "nomVariableCheckbox ".$nomVariableCheckbox."<br />";
	foreach ($idCheckbox as $id => $valeur) {
		//echo $nomVariableCheckbox.'['.$id.']='.$valeur."<br/>";
	        $departement[$i] = $nomVariableCheckbox.'['.$id.']='.$valeur;
								}
							}