PMM is exactly right. In fact, this woman may be under investigation for misrepresentation and may lose her PR status as well. Also, the H&C failed because there was "benefit" to the woman NOT claiming her husband. She wouldn't have been eligible otherwise. If there had been no "benefit" gained by her by not declaring him, then it may have had a chance but it as it was, the H&C was pretty much doomed from the start. If she remains a PR, she can never sponsor him because he has been excluded.
Sorry but this is a lost cause. Hopefully, if he really wants to come to Canada, he can qualify under one of the other programs like skilled worker or perhaps come as a student and work his way towards PR. Best of luck.