Description:
------------
Only "first level keys" was slashed.




Reproduce code:
---------------
<?
	echo "<pre>";print_r($_POST);echo "</pre>";
?>
<form method="POST">
<input type=text name="test['aaa']['bbb']" value="'">
<input type=submit>
</form>

Expected result:
----------------
Array
(
    [test] => Array
        (
            [\'aaa\'] => Array
                (
                    [\'bbb\'] => \'
                )

        )
)

Actual result:
--------------
Array
(
    [test] => Array
        (
            [\'aaa\'] => Array
                (
                    ['bbb'] => \'
                )

        )
)