Rejuvenating an old rosemary
I have a rosemary in a pot which I've had for around three years. I've potted it on a couple of times as necessary, but it's not looking too great now. There's a lot of woody growth at the bottom and then it sprawls untidily, with oddly bent branches. It's very far from a tidy, compact bush. It has multiple woody stems emerging from ground level.
It suffered badly last winter (2012-2013), so last summer was very much a rescue effort, cutting out the worst affected parts. This winter I was much more careful (fleeced the plant and bubble wrapped the pot) and it seems much happier than it did this time last year, with plenty of new growth. The layers that I took from it last year are looking fantastic too.
So my question is, can I get it into better shape? I could remove the branches that spread out beyond the shape that I'd like, but beyond that, I'm not sure how to deal with it. Could I maybe divide it, since it has multiple stems?
Thanks for any advice.