Top Jailbreak application for Facebook’s enthusiasts who wish to obtain the iOS 6 Facebook functionality directly on their iPhone running iOS 5. The Cydia application FacebookThis is providing the element that you won’t find on any official application on the Apple’s app store. The tweak can be installed on iPhones running jailbroken iOS 5, and allows users to post images from inside the iPhone’s Photos app directly to their Facebook timeline.
After you install the FacebookThis on your iPhone you will not find any additional icons or even preferences in the settings panel. The app simply modifies the menu that you access while viewing images utilizing the action button found at the tool bar. The moment you tap over the menus you will get the new Facebook option sitting there, which when tapped over will offer you a window that contains the selected photo plus a text area enabling users to type in a brief message before publishing it together with the photo.
FacebookThis requires you to one time authorize your account, and after that you will not have to repeat the process every time you post the images to your Facebook page. Once complete, the picture and the text if any is published instantly on your Facebook timeline.
FacebookThis is a free Cydia app, and you can download it via BigBoss repo, but as already told you will need iOS 5 or higher to make it work on your iPhone.