You'll need GroovyLock and customLS to hide things on your lockscreen.
Here are 11 beautiful lockscreens for your iPhone or iPod Touch on iOS 7.
I will upload 4 more lockscreens next week.
To change the weather, go ahead and open up LockBackground.html via iFile and search for "location", there will be a weather code like this "USCA9301". Now simply replace it with your weather code that you can find on the weather channel website or just google it.
To change the background simply replace LockBackground.png with your own wallpaper with the exact same name.
If you want a free copy, please follow me on Twitter: @donitechh and tweet me your Cydia ID.
"Those who tweet without including their Cydia ID, will not get a free copy".