A normal URL will have the link as the URL and the text. Simply change the text. Example (use [ and ] instead of { and }):
{URL="http://rc-monster.com"}DISPLAY ME INSTEAD{/URL}
Result:
DISPLAY ME INSTEAD
Another easy way to do it would be to type what you want displayed, highlight that text, clock the link icon (the globe with the chain link on it), and then copy/paste or type the URL in there.