Решил сам
Изменил строку
'product_reviews' => sprintf($this->language->get('text_product_reviews'), (int)$result['reviews']),
на
'product_reviews' => sprintf($this->language->get('text_product_reviews'), (int)$product_info['reviews']),
в файле /catalog/controller/module/featured.php
$this->data['products'][] = array(
'product_id' => $product_info['product_id'],
'thumb' => $image,
'name' => $product_info['name'],
'price' => $price,
'special' => $special,
'rating' => $rating,
'reviews' => sprintf($this->language->get('text_reviews'), (int)$product_info['reviews']),
'href' => $this->url->link('product/product', 'product_id=' . $product_info['product_id']),
'description' => utf8_substr(strip_tags(html_entity_decode($product_info['description'], ENT_QUOTES, 'UTF-8')), 0, 100) . '..',
'product_reviews' => sprintf($this->language->get('text_product_reviews'), (int)$product_info['reviews']),