how can I call label text substitution in pl-sql?

We have created navigation bar list which consist of report pages and some titles(its just a header). After that we built an authorization controller(pl/sql) for these content to make some of pages and titles invisible depends on users. Anyway, because of titles are not a page we could not assign request to describe title. If we can get "List Entry Label" in plsql code we can control the navigation bar as our purpose. #LIST_LABEL# substitution string to reference the list label text.But we don't know how to get it.

I need to use label text substitution in pl-sql. So, can you help me, how can I call it in pl-sql?