Keep navigation module previous state while navigating through multiple apps

I have made a navigation bar as a model. In the menu bar, i have a dropdown selection box. Each item on the navigation bar leads to another app. The dropdown is selection is supposed to be global. So when I navigate to another app, I expect the selection I made before clicking the navitgation bar stays. But it actually doesn't. How can I make the navigation bar (module) to keep the selection when moving between the apps?