If your hair gets that tangled particularly when wet, it could be that the ends are excessively dry/split and the problem would probably be much improved by a trim and tidy at the the salon.
Alternatively, as the other's have said, use a wide toothed comb (something like an afro comb would be ideal) and comb through the conditioner and leave it on for a few minutes before rinsing. Also, a hair mask (get from boots, tressemme make one) might also help.
love
mimi