Код кнопки " В корзину"

судя по документации должен ставить именно кнопку
www.hikashop.com/support/documentation/1...-product-insert.html

можно в принципе переопределить сам код кнопки, в хика есть такой механизм. Если есть определенные навыки в php - то могу подсказать куда рыть

For the buttons:

You need to create the file templates/YOUR_TEMPLATE/html/hikashop_button.php. We invite you to look at the file administrator/components/com_hikashop/helpers/cart.php for the default code of the function you will define in it. In that file, you will be able to define the function:

hikashop_button_render($map,$name,$ajax,$options,$url) => The $map variable contains the name of the button, the $name variable contains the value of the button (what the user see). The $ajax variable can contains additional attributes for the HTML element of your button as well as the $options attribute. The $url variable can contain a URL where to redirect when the button is used as a link. You need to return the whole HTML of your buttons at the end of your function.