website is totally messed up , need a system admin/webmaster

Hey Guys One of my client's website has completely got messed up. I don't know if we got hacked or the previous programmer done something and not willing to admit it but I need to bring it back to health. I'm assuming for you can see the issue [login to view URL] all the links are not working and the design is on the side strangely. If this works I have a lot of webmster work for you also.