'Grabless' Hides the Grabbers From Notification Center and Control Center Interfaces
To further simplify the appearance of Notification Center and Control Center in iOS 7, check out a new free jailbreak tweak called Grabless
by iOS developer hiroshit.
The tweak will remove the arrow tip-shaped grabber that appears on either of the two interfaces when they're opened up. Shown above, you can see the difference made in Control Center, and shown below, you can see the difference made in Notification Center:
Grabless doesn't have any options to configure and it's a relatively straightforward tweak. If you ever want to disable it, you'll need to uninstall it from Cydia.
If you want to give Grabless a try, it's available for free right now in Cydia's BigBoss repository. It requires iOS 7 to be installed.
iPhone 5 running iOS 7.0.6