PIC16F72 does not support the master I2C mode required to drive a display. You can use PIC16F876 or 877 instead.
To do it you'll need ldmicro32, external libraries, and HTC Compiler for Pic16.
All you need is on Github:
https://github.com/joegil95/LdMicro32
Here's attached an example of ladder working with PIC16F876 driving an I2C 16x2 lcd display..
José