Hi,
"/component/hikashop/" is generated by the Joomla SEF.
It means that, when SEF is activated, you can call all pages using a more human readable method.
So "index.php?option=com_hikashop&ctrl=product&task=show&cid=1" become "index.php/component/hikashop/product/cid-1".
Now, you can create joomla menu.
Using menus, you can set special url using the alias.
So, instead of opening the classical path, it would use the menu.
You can't rename "/component/hikashop" to "/component/ourshop" without modifying the HikaShop component name (so, changing all base folders, xml, and a lot of files).
Regards,