function woocommerce_template_loop_categories() {
global $product;
echo $product->get_categories( ', ', '<span class="posted_in">' . _n( 'Category:', 'Categories:', $cat_count, 'woocommerce' ) . ' ', '</span>' );
}
add_filter('woocommerce_after_shop_loop_item_title','woocommerce_template_loop_categories', 3 );