Besides getting the number sprockets on the rear that your shifters are able to shift. You also need to make certain the hubs have the same OLD as do your existing. Over locknut dimension, which is what your dropouts and fork ends are spaced for.

While I agree that you should use all Campagnolo stuff it you have a Campagnolo drive train, you can run a Shimano/SRAM compatible cassette and free hub in a Campy drive train. However for peak shifting performance, you should use all Campy.

Don't assume we know about your previous posts. So put all the information that is pertinent to your thread in each thread. Pretend that all your responders have no idea about anything you've said in other threads.