Negative, she won't get a visitor visa if her husband has filed I-30 for her. The consular will say your petition on the way, please wait for that.

Probably there will be little chance if she apply as a single (not married, don't ever mention about her husband ) But it will  lie to the embassy whice might have a problem for her in future. I recommend her to wait util her visa available.

There could be other ways but I don't know................................