Problem Description:

If you have created a special category such as Featured to display specific content on your home page, you may not want this category showing up on your blog page, in RSS feeds, or in the WordPress Category widget

Answer:

The easiest way to do this is with a plugin such as Ultimate Category Excluder

Please note, Obox does not provide direct support for 3rd party plugins. Please see What Plugins Are Compatible With Obox Themes? for more information.