RTL page and menu

hi, i tried to read through forums how to change the appearance to RTL, unfortunately all the replies was in private, i did that code

<?php
function hb_set_my_locale($locale) {
$locale = ( is_admin() ) ? “ar-AE” : “ar-AE”;
setlocale(LC_ALL, $local );
return $locale;
}
add_filter( ‘locale’, ‘hb_set_my_locale’ );
?>

and it destroyed my page and my theme, I need a solution ASAP please as i have a contract and i might lose it if am not on time, thanks alot.