Hi Lisa.
To clarify, do you mean you have a link in the header pointing to a particular page (group, blog, etc) in the site?
If so, one possibility is to use the "Navigation - Custom" widget, which allows linking to specific places on the site without hardcoding their URLs.
Or do you mean that there is some dynamic behavior on the page which refers to another part of the page? If so, how is that being linked currently?
Thanks