VaultWiki allows your existing forum users to collaborate on creating and managing a site's content pages. VaultWiki is a fully-featured and fully-supported wiki solution for vBulletin and XenForo.
The VaultWiki Team encourages you to join our community of forum administrators and check out VaultWiki for yourself.
$prefix = trim(preg_replace('#([A-z])#U', ' \1', $forum_header_namespace)) . '-';
$prefix = trim(preg_replace('#([A-Z]?[a-z]+)#', ' \1', $forum_header_namespace)) . '-';