to change you; to change something for you
Ora andate a cambiarvi, e a fare un bel bagno.
Now go get changed and take a nice bath.
— Il gattopardo (1963)
Andate a cambiarvi.
Go change your clothes.
— Fuck you, prof! (2013)
Dovreste cambiarvi prima di uscire.
You should change before going out.
— Two Sisters (2003)
Voi, subito a cambiarvi.
You, get changed right away.