If they have only had the house for a year, then it is probably worth less money than when they bought it. They should do a short sale with a realtor if possible. They can go to a paralegal for help with their divorce and it is done very cheaply. The most important thing is to find out what if any tax consequences or credit consequences the short sale would put them in. Good luck to them.
There are many books on the matter, but because they have only had the house for a short time, if they can sell they should, then split the profit. If they have kids, it may be better to stay in the home, although if he is like me and cannot afford his own place and the house, it should still be sold.