Displaying data in Mendix can be done in may different ways depending on your use case.
In this case what I understand you want to show rows with data and by clicking on it you want to show more details?
Instead of using the navigation bar for this, the approach in Mendix would be to create a page with a datagrid(or datagrid 2) on it. This will let you select attributes that you want to show(columns). On the right of the datagrid or bellow you could show a dataview that listens to your datagrid. That way, by clicking on a row in the grid, you will be able to show more details of that specific row.
Hope this gives you a bit of an idea on how to proceed.!