Sorry, turning of the SEF it works.
Initially, I had created the menu item and uses the registration form.
But, realize later on I need to change the top header to something else if user has login.
So, therefore, I had created a custom html instead of using the menu.
So, I just copy the link for href register.
I guess in custom html when setting the href, is there a way to hide the the link that show index.php/component/hikashop/user/form?Itemid=516
to something shorter such as gemboxjewellery.com\register
Thanks for you help.