Q.Dividing a Lantana Bush
When and how should an overgrown Lantana bush be divided ?
Certified GKH Gardening Expert
It would seem that the best way to control it's growth is to simply prune it. You can make copies of this plant by cloning the new growth that has been cut off.
Here is an article on pruning: https://www.gardeningknowhow.com/ornamental/flowers/lantana/lantana-pruning.htm
Here is an article on propagating by cuttings: https://www.gardeningknowhow.com/ornamental/flowers/lantana/how-to-propagate-lantana.htm