I've a page with a link like this:

<a href="Login.php?LogType=SearchProfile">Profils de recherche</a>
<a href="Login.php?LogType=ResellerProfile">Annonces</a>

I'd like to avoid passing those variables in the URL. How can I avoid this ?

I've also a lot of redirect like:
header("Location: EditUser.php?UserID=".echo($id));

but none should show any information on the URL.

How to avoid this ?