We are migrating an application from 5.5 to 7.2 and it uses a fixed type portal configured with tabs, and within each tab, it is configured with narrow columns (which show up on the left navigation panel) and wide columns (which show up on the main content section). Each entry in the column has a setting for a gadget name, gadget title, gadget image, and check boxes for Custom, Expanded and Deferred?

One challenge we are facing is to be able to update the main content body when a option from the left navigation column is selected.