[rabtb]

add to global.php

        //[spoiler]Text[/spoiler]
    $s = preg_replace("/\[spoiler\]\s*((\s|.)+?)\s*\[\/spoiler\]\s*/i",
    "<b>Spoiler:</b><table border=1 cellspacing=0 cellpadding=3><tr class=spoiler>
<td style='border: 1px black solid'><font color=#000000>\\1</font></td></tr></table>", $s);