HTTP_SERVER.'index.php?route=product/product&product_id=' . $product['product_id']
Href karşısına bunu yapıştırın eskisini silin.
$data['products'][] = array(
'order_product_id' => $product['order_product_id'],
'product_id' => $product['product_id'],
'name' => $product['name'],
'model' => $product['model'],
'option' => $option_data,
'quantity' => $product['quantity'],
'price' => $this->currency->format($product['price'] + ($this->config->get('config_tax') ? $product['tax'] : 0), $order_info['currency_code'], $order_info['currency_value']),
'total' => $this->currency->format($product['total'] + ($this->config->get('config_tax') ? ($product['tax'] * $product['quantity']) : 0), $order_info['currency_code'], $order_info['currency_value']),
'href' => HTTP_SERVER.'index.php?route=product/product&product_id=' . $product['product_id']
); Bu şekilde yaptım ama siteadi.com/admin/index.php?route=product/product&product_id=65 şeklinde çıktı