SRAM Cassette on Campy Wheels
Campagnolo wheels are available with both Shimano/SRAM and Campagnolo cassette compatible freewheel bodies. Ask which cassette your friend has and if they have Campagnolo, you can get the correct freehub body as a spare part.

SRAM/Shimano and Campagnolo cassettes have slightly different cog spacing. You can mix them, but the derailleur adjustment will be slightly off.