Its such a small thin wire, no real way to safe it in the long run. I've been stabbed by a couple before. It should be possible to carefully trim the tip of the leaf off or use a very very sharp scalpel to cut a slit then pull it out that way. Or rust it out...
Generally the main trick with them is to not bend them at all.
You CAN get other leaves that can be wedged into the hole on the suction cup, some major craft supply houses carry them for making hand-made synthetic wreaths. Most fake x-mass trees are made with cluster-socket and ball-leaf assemblies. You could even make your own with some kind of stand and hand-cut shapes pushed down onto it.