You can get the database here.
To test it out, compose a new document with either the "Collapse Embedded View Example" form or the "Collapse Embedded Single Category Example" form.
Don't Forget! When you are testing this in the client, make sure you close the form in design mode. If you don't, the embedded view will continue to stay open and the collapse will never work.
If you have any problems with the sample database, you know where to find me. Have a great weekend everyone!