You won't be able to sponsor her for a partner sponsored residence visa till after you've been living together for 12 months, but with 2 - 3 months' evidence of living together, you can apply for a work visa for her, as the partner of a New Zealander. See here.
https://www.immigration.govt.nz/new-...s-visa-holders (She doesn't HAVE to work on this visa, but she has permission to take any job if she wants to.) Also see the old threads about evidence of partnership, to give you some ideas.
https://www.google.co.uk/#q=site:enz...tnership+proof
Once she has lodged her application, she will be given an interim visa to keep her legal to stay in NZ while the case is being processed.