Откроем файл category.php (../catalog/controller/product) и вырежем это (246-268):
$this->data['sorts'][] = array( 'text' => $this->language->get('text_rating_desc'), 'value' => 'rating-DESC', 'href' => $this->url->link('product/category', 'path=' . $this->request->get['path'] . '&sort=rating&order=DESC' . $url) );
$this->data['sorts'][] = array( 'text' => $this->language->get('text_rating_asc'), 'value' => 'rating-ASC', 'href' => $this->url->link('product/category', 'path=' . $this->request->get['path'] . '&sort=rating&order=ASC' . $url) );
$this->data['sorts'][] = array( 'text' => $this->language->get('text_model_asc'), 'value' => 'p.model-ASC', 'href' => $this->url->link('product/category', 'path=' . $this->request->get['path'] . '&sort=p.model&order=ASC' . $url) );
$this->data['sorts'][] = array( 'text' => $this->language->get('text_model_desc'), 'value' => 'p.model-DESC', 'href' => $this->url->link('product/category', 'path=' . $this->request->get['path'] . '&sort=p.model&order=DESC' . $url) );
или в шаблоне