If you want your top friends hidden, you can use this:
<style>
.a {hide friends}
.friendSpace {display:none;}
</style>
If you want your top friends hidden, but not the view all friends link or the number of friends, you can use the Right Column Generator to specify exactly which things you want hidden.
This is an example of what your profile would look like after adding the code:
Categories: Myspace | Hide | Friends | Tweaks