what will you do if your friend is a battered wife?

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i have a friend that get married at a very young age. Now she suffer already bec her husband is very irresponsible man. I thought she's happy on her decision but my friend told me that shes a victime. Her husband always hit her every night even she's pregnant. I always convince her to file a divorce paper and i want to help her also but she always say that he love her husband so much. I dont know what to do, i want to help her but she always refuse that everything is ok that her husband will change also but for what i saw to her she suffer so much to much pain is enough. How can i help her?