[Chez]

put this in include/global.php

PHP Code:

// [center]Center[/center]
        $s = preg_replace("/\[center\](.*?)\[\/center\]/si", "<center>\\1</center>", $s); 


after

PHP Code:

// [u]Underline[/u]
        $s = preg_replace("/\[u\](.*?)\[\/u\]/si", "<u>\\1</u>", $s);