If you have accidentally hidden a friend, page or application from your News Feed, or have changed your mind and would like to have them grace your News Feed with their presence, you can easily unhide them by following these steps.
1. Go to Facebook and logon to your account.
2. On the Home page, scroll down to the very bottom of the page and click Edit Options.
3. Select Either Friends, Pages, or Applications from the top of the list.
4. Locate the Friend, Page or Application that you wish to unhide and click the associated Add To News Feed button.
5. Click the Close button.