Hi,
As I said, it will display on the user profile edit page if you activate the corresponding setting of the HikaShop user synchronization plugin.
So no code required.
Now, you can display the value of a custom user field quite easily anywhere on your website with such code:
// load hikashop
if(!defined('DS'))
define('DS', DIRECTORY_SEPARATOR);
if(!include_once(rtrim(JPATH_ADMINISTRATOR,DS).DS.'components'.DS.'com_hikashop'.DS.'helpers'.DS.'helper.php'))
return;
$user = hikashop_loadUser(true);
echo $user->xxx;
Where xxx is the column name of the custom field.