How do I prevent a Category from showing in Self Service?

[CapU]

My manager wants make Self Service visible to all users (currently only IT has access to SS)
He wants SS to look similar to Software Centre from SCCM. I have to whittle:
OSX Tools
OSX Defaults
University Music
OS
Printers
Productivity
Software Updates
Video Editing
Drivers
Media Plugins and Viewers
Microsoft Office
Adobe Utility
down to:
Pre Approved
Requires Approval
IT Tools

Admittaly some of these Categories I created to keep stuff kinda of organized. Besides using "None" how can I prevent a category from being seen in Self Service?

[apizz]

@CapU the only way to hide a category is not to have Self Service policies assigned to them that your users have access to.

So if you have Self Service policies in multiple categories you're going to run into this problem. Just only have them assigned to the one category you want them to be displayed in on Self Service.

[PeterClarke]

Simple - Your 'Target' machines just need to NOT be in scope - for the policies that you DONT want them to see..

That way they will ONLY see policies that that ARE in scope for.