http://www.immigration.govt.nz/migra...milystream.htm
Here's the page at NZIS that tells you about partner sponsored work visas of various kinds, which you get depending on your partner's nationality, or whether they have PR or a work visa. In all cases, to be eligible, you have to prove that you are this person's genuine partner (and this is what Womble 10 has been doing).
You don't have to have been in the relationship for a year. How long the relationship has been going on can in some cases make a difference to the length of the visa they will give you.