Hi,
Yes, the depth parameter Jerome was talking about is what you need for that.
It's a parameter you can add to the list of parameters used when loading the selector:
hikashopNameboxType::NAMEBOX_MULTIPLE,
'category',
array(
'delete' => true,
'sort' => true,
'default_text' => '<em>'.JText::_('HIKA_NONE').'</em>',
'tooltip' => true,
)
);
You can find that code in the file "form" of the view "product" via the menu Display>Views.
To easily know which view file to edit, you have the "display view file" setting of the HikaShop configuration. I invite you to try it.