Well, I found the following on familysearch.org:
groom's name: William Jones
groom's birth date: 1880
groom's age: 32
bride's name: Rhoda Tate
bride's birth date: 1887
bride's age: 25
marriage date: 21 Aug 1912
marriage place: St. Alban, Liverpool, Lancashire, England
groom's father's name: Edward Jones
bride's father's name: George Edward Tate
groom's marital status: Single
bride's marital status: Single
indexing project (batch) number: M00783-7
system origin: England-EASy
...which suggests that they didn't leave for NZ until after 1912, at least.
I wasn't able to find a specific unit for William Jones (or rather, to distinguish which William Jones is yours!) but you might find this accounting of life at Trentham interesting and helpful in deciphering any other data you might have on the man?
HISTORIC TRENTHAM, 1914-1917: THE STORY OF A NEW ZEALAND MILITARY TRAINING CAMP, AND SOME ACCOUNT OF THE DAILY ROUND OF THE TROOPS WITHIN ITS BOUNDS
http://www.nzetc.org/tm/scholarly/name-427668.htmlMy only other thought is that kilts were usually the uniform of Scots; was he a member of the Liverpool Scottish, perhaps? I can't find any reference to them going to New Zealand, though - do you have any indication of how/why he ended up there? Perhaps to train the New Zealand Army (which was formed in 1914 after Great Britain entered WWI?)
Here's a history of the Liverpool Scottish, which has a few images of uniforms similar to the one in your photo:
http://www.liverpoolscottish.org.uk/history.htmCan't quite connect the dots... but hope that helps you do so!
Anita