Combining interfaces and VLAN networks

[CJ]

Horrible title but I'm not sure what the best phrasing is.

I have two physical interfaces that each have a VLAN capable device at the other end.  One is an AP and the other is a switch, if it makes a difference.

I would like to put certain devices from each of them on the same subnet.  I had originally thought that I could just assign them the same VLAN and that would take care of it but that doesn't seem to be the case.

It appears that what I need to do is bridge the two VLAN interfaces together, which means that the actual VLAN ID that they use doesn't have to match.  Is this the best method or is there a different solution that I'm missing?

Thanks.