divējs is an adjective that I'm guessing describes something that has two sides but I can't find it in the dictionary. Example setences
I believe divējas durvis means double doors that are seperated i.e. it's the same doors but each door leads to a different room. Description here
Since durvis is a plural noun that is feminine, divējas is the plural of divēja which is the feminine form of divējs.
Wheather it's divējas durvis or divējās durvis depends on the context.
divējas durvis = some double doors
divējās durvis = the double doors
If you want to talk about divējas durvis in general then I don't know which is more correct.
Does it make sense?