Here goes nothing... This movie is about a tribe. They get attached. The Wife and child of one of the tribe members are hidden in a hole for safety.
Do I kow the year... no way. I wish I had more to go on.

This recent one has that happen. But if you could provide more details if it isn't the one, that would be great.

Apocalypto (2006) (http://www.imdb.com/title/tt0472043/)

I think that's it. Thank you very much. For the amount of detail... here's what I have.

It's based on a real tribe (somewhere).. it gets raided and the chief gets killed... his son (who has a family of his own) puts his son and wife in a whole to hide them.. but gets taken as a slave by the bad guys.