You can find the explanation in the below paper. I suggest you to read the algorithm in the paper and then download ga and bfa separately from mathworks and combine them according to the algorithm. 

http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=4428033&isnumber=4427647

Dear Jagadeesh Gunda

the problem is that I don't know how to combine these two algorithms.

could you please assist me and send a very easy optimization problem with Bacterial-ga foraging Algorithm?

Thanks a lot