ShrikUrl is a very simple application that allows you to quickly shorten a URL. Just paste the long URL into the Trim section of the application and hit Shrink URL. It will then display the shortened URL. After you select Copy to Clipboard, the app can be closed and the shortened link will be in your clipboard. To paste the shortened URL, just tap wherever you would like it and select paste. The shortened URL will stay in your clipboard until you copy something else. //
When I tested this app it worked exactly how it should. You can get ShrinkUrl via the BigBoss source. Also note that the package is spelled incorrectly in Cydia. It is spelled ShirnkURL however, the app is spelled correctly on the SpringBoard.