What tag can I use to get the detailed URL of the 'What's New' index page and the index page of a subcategory on the homepage in such a way that it is not hardcoding the static URL? (i.e. if the page loads through page.cgi - it will show the dynamic version)

For example, I'd like to retrieve the detailed URL link tag for these two pages on my homepage:

/New/index2.html (homepage for What's New)

/Gallery/index2.html (a subcategory just below my homepage)