I need help from someone who has knowledge of or a legal background...?

my husband verbally gave my daughter permission to use him as a co-signer on an apartment she wanted to rent with some fellow students.She did so and gave a $ 250 deposit.But she never moved into the apartment (because she found something cheaper)She told the people at the complex that she would not be moving in and they told her that they would put it on the re-rent list.So she thought everything was ok..But it turns out they are now trying to get a judgment on both her and my husband for the full year the lease was for.It has only been six months into the time that she should have moved in so she asked if she could have an room in an apartment any one available till the end of the lease.They told her no that they didn't have any rooms open for her to rent. Where it would be four girls sharing an apartment (this is student housing)What I want to know is how can the get a judgment against both she and my husband.They want both of them to pay the full amount of the lease and they have also rented the apartment my daughter wanted to live in with her friends.Also they told her that they had no others open for her to move into. If there are none available how can they sue she and my husband for something that they have already rented and are being paid for. That was the whole point of putting it on the re-rent list.Can someone please tell me if they can get away with this. My husband has talked with an attorney and he said to file bankruptcy.So can anyone give me any idea how they can do all of this?Thank you so much for all your help!I just want to make sure you understand that they are trying to be paid for this lease by 3 different people.The one living in it now,my daughter and my husband.Thanks again and if you have any questions just email me from my profile page I will be glad to answer any questions.