I think you need to go back to some of the tutorials and get to grips with the basics 🙂
<?php
if( $sabers )
{
echo "<p><a href='$PHP_SELF?sabers=1'>Sabers</a></p>";
// stuff
}
else
{
echo "<p><a href='$PHP_SELF?=daggers'>Daggers</a></p>";
//stuff
}
?>