function bb2($str)
{
        if (preg_match('#\[(syntax)=\"(.+)\"\](.*)\[/syntax\]#isU', $str, $matches))
        {

        include_once('./system/application/libraries/geshi.php');
        if ($matches[2] == 'es') {
                $matches[2] = 'eventscripts';
        }
        $geshi =& new GeSHi($matches[3], $matches[2]);
        $syntax = $geshi->parse_code();
        } else {
        $syntax = "";
        }
    $find = array('#\[ ?b *\](.+)\[ ?/b *\]#isU',
        '#\[ ?i *\](.+)\[ ?/i *\]#isU',
        '#\[ ?u *\](.+)\[ ?/u *\]#isU',
        '#\[ ?s *\](.+)\[ ?/s *\]#isU',
        '#\[(colou*r)=(.+)\](.*)\[\/\1\]#isU',
        '#\[ ?quote *\](.+)\[ ?/quote *\]#isU',
        '#\[ ?list *\](.+)\[ ?/list *\]#isU',
        '#\[ ?\* *\](.+)\n#isU',
        '#\[(size)=([0-9]*)\](.*)\[\/\1\]#isU',
        '#\[(quote)=([a-z0-9]*)\](.*)\[\/\1\]#isU',
        '#\[(syntax)=\"(.+)\"\](.*)\[/syntax\]#isU',
        '#\[ ?code *\](.+)\[ ?/code *\]#isU',
        '#\[ ?img *\](.+)\[ ?/img *\]#isU',
        '#\[url=(https?:\/\/)([^\]]*)\](.*)\[\/url\]#isU',
        '#\[url=([^\]]*)\](.*)\[\/url\]#isU',
        '#\[url\](https?:\/\/)([^\[]*)\[\/url\]#isU',
        '#\[url\]([^\[]*)\[\/url\]#isU',
        '#\n#'
);
    $replace = array('<b>\1</b>',
        '<i>\1</i>',
        '<u>\1</u>',
        '<s>\1</s>',
        '<span style="color: \2">\3</span>',
        '<table width="100%" bgcolor="lightgray"><tr><td bgcolor="white">\1</td></tr></table>',
        '<ul>\1</ul>',
        '<li>\1</li>',
        '<span style="font-size: \2">\3</span>',
'<table style="padding-left:30px" cellspacing="1" cellpadding="3" width="100%" border="0">
<tr><td><b>\2 wrote:</b></td></tr><tr><td style="background:#F0F0F0"><br
/>\3<br /></td></tr></table>',
'<table style="padding-left:30px" cellspacing="1" cellpadding="3" width="100%" border="0">
<tr><td></td></tr><tr><td style="background:#F3F3F8; white-space:pre">'.$syntax.'</td></tr></table>',
        '<table style="padding-left:30px" width="100%"><tr><td bgcolor="white"><code>\1</code></td></tr></table>',
        '<img src="\1" alt="" />',
        '<a href="\1\2">\3</a>',
        '<a href="http://\1">\2</a>',
        '<a href="\1\2">\2</a>',
        '<a href="http://\1">\1</a>',
        '<br />'

);

    $str = preg_replace($find, $replace, $str);
    return $str;
}