Making links posted bold?

[hitmanuk2k]

How is this achieved with making each one bold using bb code. I know it's possible as I did it on my old style but can't find out how I did it :speechless:

http://www.test.com <<<this would auto go bold.

But I don't think I could add CSS, as that would change ALL links. I only want the links posted to change. I know it's the [url] BB code I need to change, but I can't find it.