There are organisations that could help, and I'm sure if she really wanted to, she would take your advise and move away.
She's obviously in need of support, but unless she makes the move to take herself out of this dominating lifestyle, there's nothing you can physically do.
Provide her with tel numbers, support housing, Physical/Mental Abuse Organisations, although this, and quiet a few 'talks with her', I suspect you've already done as her friend.
It's always frustrating to witness such a relationship and even more so if this girls family have ignored the problem, but maybe they too, have felt like you, many times over, helpless in watching her put herself through this situation.
SHE has to make her decision, and only then can she make a decent life for herself, and be free of this mans rage and vicious attacks.
Caramac x