HI,
Panjab University has 3 year LLB course with them that you can apply after graduation but even law course after 12th that is 5 year program.
You can check the complete dates here:

http://www.law.careers360.com/articles/pu-ba-llb-important-dates
For 5 year Law program you can also give entrances like
CLAT
BLAT
LSAT India

and there are many more.

Good Luck.