add to cart

my category pages default to "buy now". i need add to cart.
I have it set to "add to cart" in thje options but that doesnt effect catrgory pages like:

http://www.ybrmarket.com.au/for-boys/

how can i achieve this in shortcode?

<?php if (is_category('Boys Clothes')) {
echo do_shortcode('[mp_global_categories_list order_by="name" order="ASC" paginate=false per_page="40"]');
} ?>