[sajjid]

Thanks guys a combined effort has worked.
Boofo you are quite right

global $vbulletin;  
if ($vbulletin->userinfo['userid'])   
{  
return "<a href=\"$rightlink\" target=\"_blank\">$text</a>"; 
}  
else  
{  
return "Guests cannot view links. You must <a href='register.php'>register</a> to see links."; 
}

i like to take this step further how do i go about hiding links that are in between code /code and also in the archive