To replace the cabin filter on the 2007 Odyssey, the glovebox access is different than earlier years. To drop the glovebox, you must release the damper arm. This is accomplished by first removing the retainer cover/clip which slips over the end of the rod and post (pull/slide off the end of the rod). You must then remove the door stops (2) by prying inward on the tabs inside the glovebox. The glovebox will then lower to reveal the the filter housing. Push inward on the release tabs on either side of the housing and slide it out.
When inserting the new filter into the filter rack, be sure to place the end pleats into the slots provided. This assures that all air will go through the filter.