This might be hard to get to post without it going crazy or actually making the link, but here we go...
(whatever you want your link to say)
CRAP. Hold on...
[URL = "http://whateveryourlinkis.com"] (What you want your link to say) [/URL]
Okay ^ right above here where you see the equal sign, I had to put spaces around it. You don't actually put the spaces there, it would really be like [URL="http://.... if that makes any sense.