Вот в этих строчках менять у всех?
$this->db->query("INSERT INTO " . DB_PREFIX . "review SET author = '" . $this->db->escape($data['author']) . "', product_id = '" . (int)$data['product_id'] . "', text = '" . $this->db->escape(strip_tags($data['text'])) . "', rating = '" . (int)$data['rating'] . "', status = '" . (int)$data['status'] . "', date_added = '" . $this->db->escape($data['date_added']) . "'");
$this->db->query("INSERT INTO " . DB_PREFIX . "review SET author = '" . $this->db->escape($data['author']) . "', product_id = '" . (int)$data['product_id'] . "', text = '" . $this->db->escape(strip_tags($data['text'])) . "', rating = '" . (int)$data['rating'] . "', status = '" . (int)$data['status'] . "', date_added = '" . $this->db->escape($data['date_added']) . "'");
$this->db->query("UPDATE " . DB_PREFIX . "review SET author = '" . $this->db->escape($data['author']) . "', product_id = '" . (int)$data['product_id'] . "', text = '" . $this->db->escape(strip_tags($data['text'])) . "', rating = '" . (int)$data['rating'] . "', status = '" . (int)$data['status'] . "', date_added = '" . $this->db->escape($data['date_added']) . "', date_modified = NOW() WHERE review_id = '" . (int)$review_id . "'");
$this->db->query("UPDATE " . DB_PREFIX . "review SET author = '" . $this->db->escape($data['author']) . "', product_id = '" . (int)$data['product_id'] . "', text = '" . $this->db->escape(strip_tags($data['text'])) . "', rating = '" . (int)$data['rating'] . "', status = '" . (int)$data['status'] . "', date_added = '" . $this->db->escape($data['date_added']) . "', date_modified = NOW() WHERE review_id = '" . (int)$review_id . "'");