ClassicLock Cydget is a lockscreen Cydget for iOS 7 and 8 which gives you back the good old iOS 6 lockscreen look and feel.
It is very easy expandable so you can have many cool widgets and extensions on your fake-iOS6-Lockscreen.
First install this package and the dependencies. Go into settings app -> Cydget -> ClassicLock. Select and put it on top of the list.
Respring now. Now you should see the good old iOS 6 Lockscreen just like you know it.