How do you get a link to say somethine else I.E. like this trucknetuk.com/phpBB2/viewtopic.php?t=11919
type what you want it to say instead
No spaces after the = sign or before the ], I had to put them so you could read what I had typed.
If you leave your cursor hovering over the URL button while composing your reply/post, you can see an example which is shown above the ‘text window’.
I usually do it this way 'cos I can’t remember how otherwise! 
Which also works with the other buttons. Just hover your mouse pointer over the button and you get tips with examples of how it should look when you’ve finished.