Nope sorry was talking a load of rubbish there you cannot crate a bbcode that already exists.
Sorry.
Right how cofident are you with altering php files, I'm not at a pc I can test this on, but if you look at the file class_bbcode.php in the includes directory.
Around line 1777 fine
PHP Code:
function handle_bbcode_url($text, $link)
This is the function that parses the url
before
PHP Code:
$rightlink = trim($link);
on line 1779 put
PHP Code:
$rightlink = "http://www.site2.com/redirect.php?tid=xx&url=$rightlink";
Make a backup of this file in case it doesn't work