First, highlight the web address you wish to link, right click it with your mouse, then hit "copy".
Then hit the "reply to thread" button, click on the "hyperlink" button (picture of earth w/ paperclip), right click on blue text field that says "http:", then click on "paste". This will insert the address you wish to link to into your reply in clickable form.
Craft your response around the link code, and hit reply. I hope this is the answer you were looking for.
