Originally Posted by DiapDealer
You don't need to "enhance" any of the (x)html or css to display whatever your heart desires in the ToC. As Jellby already mentioned earlier; simply modify the toc.ncx file manually. All the h tag and "visibility: none" trickery is only necessary when you want to generate a ToC automatically using other tools.
It will be a good opportunity to learn something new because, up to now, I used, as you say, "other tools" to generate automatically a ToC and never bothered about it.