I need to encrypt routes in this URL? Because I do not want user to access URL by changing the item id. For example, user can change /items/1234 to /item/5678. Although item
You don't want to encrypt all routes, it's bad practice. You can use encrypt() helper to encrypt parameter and decrypt() to decrypt it.
encrypt()
decrypt()
$encryptedId = encrypt($id);
https://laravel.com/docs/5.3/encryption#using-the-encrypter