This is a bad idea if nothing else prevents users from adding bookmarks to your site.
There are two ways to do this, however, if you intend to do so (and I really suggest that you go back before it is too late). You can load everything in an iframe:
<html> <body><iframe src="http://path.to.your.real.site" /> </html>
And the src property will direct to another url that actually has all the dynamic urls.
Another option is AJAX. It really is too long and complicated for an example.
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