And you still DON'T SEARCH A BIT. Xposed for L
http://forum.xda-developers.com/showthread.php?t=3034811
And if you don't know how to installe it, I suggest the General and Q&A threads. If you are already on 5.1.1 you need to go back to 5.0.2, root, recovery and then use one of the many 5.1.1 zip roms to upgrade. THEN XPOSED.
I'm answering to you because a long time ago someone did the same for me, but don't get me wrong, XDA has all the info you need, IF YOU ARE WILLING TO SEARCH FOR IT.
Also, THANKING after getting help is a GOOD HABIT to have.