[kh99]

There is something used in the RSS feed (external.php) among other places. It looks like this:

require_once(DIR . '/includes/class_bbcode_alt.php');
$plaintext_parser = new vB_BbCodeParser_PlainText($vbulletin, fetch_tag_list($vbulletin->options['bburl'] . '/'));
$plaintext = $plaintext_parser->parse($message, $forumid);

(I copied this from external.php and modified it slightly, so I don't know why it uses $vbulletin->options['bburl'] or what the $forumid is used for).