it could be a standard url mycode? or more unique bburl you want?
look
this is a examplo fo my request
code
\[bburl\]
replacement
<a href="{$mybb->settings['bburl']}">MyBB Name</a>
So you mean to when ever you use [bburl][/bburl] tags, it replaces your text to your forum's URL.
Am I right ? :-\