Вот добавила в массив
$this->data['products'][] = array(
'price_a' => $result['price'],
'product_id' => $result['product_id'],
'thumb' => $image,
'name' => $result['name'],
'description' => utf8_substr(strip_tags(html_entity_decode($result['description'], ENT_QUOTES, 'UTF-8')), 0, 300) . '..',
'price' => $price,
'special' => $special,
'saving' => ((float)$result['price'] ? round((($result['price'] - $result['special'])/$result['price'])*100, 0) : 0),
'tax' => $tax,
'rating' => $result['rating'],
'reviews' => sprintf($this->language->get('text_reviews'), (int)$result['reviews']),
'href' => $this->url->link('product/product', 'path=' . $this->request->get['path'] . '&product_id=' . $result['product_id'] . $url)
);
и вот в шаблоне
<?php if($product['price_a'] == 0) { ?>
<p style="text-align:center;margin-top:30px;font-weight:bold;">Цену уточняйте</p>
<style>
.price{
display:none;
}
</style>
<?php } ?>
но, все равно не работает(