Assuming you only care about the particular case of the Add: [0] box, here is where that is generated:
PHP Code:
// hide quantity box
if ($listing->fields['products_qty_box_status'] == 0) {
$lc_button = '<a href="' . zen_href_link($_GET['main_page'], zen_get_all_get_params(array('action')) . 'action=buy_now&products_id=' . $listing->fields['products_id']) . '">' . zen_image_button(BUTTON_IMAGE_BUY_NOW, BUTTON_BUY_NOW_ALT, 'class="listingBuyNowButton"') . '</a>';
} else {
$lc_button = TEXT_PRODUCT_LISTING_MULTIPLE_ADD_TO_CART . "<input type=\"text\" name=\"products_id[" . $listing->fields['products_id'] . "]\" value=\"0\" size=\"4\" />";
}
} else {
// qty box with add to cart button
TEXT_PRODUCT_LISTING_MULTIPLE_ADD_TO_CART has the value "Add:".
So I would say to put your div here:
PHP Code:
$lc_button = '<div class="listingAdd">' . TEXT_PRODUCT_LISTING_MULTIPLE_ADD_TO_CART . "<input type=\"text\" name=\"products_id[" . $listing->fields['products_id'] . "]\" value=\"0\" size=\"4\" />" . '</div>';
Let me know how it works.