This weekend when we were riding, apparently we rode into some sand, which didn't look deep at all.
We were going approximately 10 mph and we developed a very big wobble on the front end.
We were luckily able to ride through it and finally get the bike stopped without crashing by riding it out and finally when my husband thought it was going slow enough, he put a foot down, as did I.

Is there any known method of getting the bike to stop the wobble?

I have heard of a high speed wobble, but never a low speed wobble.