Tab/Page-Level Like Gate Settings
By default all tabs/pages in your Facebook app are set to be visible to 'All', that is both those who like and those who do not like your Facebook Page. You can change this setting for a page/tab by doing the following:
1. In the site navigation pane click on the wheel next to the page/tab that you'd like to change the setting.
2. If you wish to hide this page/tab from those who do not like your page, click the check box under "Menu Visibility" and click save.