If you mean linking to the Friends page, it just involves some editing of your templates. One way to make it more visible is to edit your postbit template, and just add in something like:
Code:
<a class="smallfont" href="friends.php?$session[sessionurl]u=$post[userid]">Friends</a>
whereever you want it. I put it after the reputation images on my forum, it's a matter of personal taste I guess.