Hiding certain bb code from guests?

[Shadowser]

Sorry, i'm not sure whether to post this here or the programming section because I don't know if it's possible to do this with vBulletin or not lol..

Is it possible to hide for example the PHP bb code from guests using vBulletin 4?

If not, is there any mod to do this? I'd program a mod for it, but I'm too new to vBulletin 4 to be able to do something like this. I don't know the hooks vBulletin uses and etc. The code itself must not be that hard, probably like if($vbulletin['user']['usergroup'] == 1) hide PHP code.

I'm not sure it's possible to edit how currently installed bb codes work.

Thanks for telling!