L.A.
Yep, it is one of those things that they want to walk but are too young to be let loose out in public. You will need to teacher her to "hold my hand." Or, explain she will need to ride in a stroller.
If she throws a fit, you will just have to leave. I know it is frustrating, but this is just part of it.
Our daughter was 6months when she first learned to walk unassisted and it did take a while for her to understand, if she did not follow the hold my hand or sit in her stroller, we would leave.