Hey Sachin.

Many Universities allow you to change your college even after completion of 1st year, if the college you want to migrate to comes under the Same university. Various universities do not allow migration to colleges under other universities, some might do. In  the former case if you take admission in another college for Ba LLLB only you will have to start the course from the beginning and you wont get admission in the 2nd year but in the 1st year again.

Best of luck