what exactly are you trying to change? If you mean the look of the short cut icons on the lock screen then you can't - they stay looking like Tochwiz. You can of course change which icons appear in settings. To completely chnage the lockscreen you are better off with a replacement, just like you replace your launcher. Check the app store. Personally I use widget locker which I have instead of the swipe unlock ripple effect screen, then I still use the built in pattern lock behind it. I have mine set up like stock jellybean but with the Missed It widget to show any notifications