Include Paths & Helper Files
Permalink 2 users found helpful/concrete/helpers/concrete/urls.php
...you would create a new file at...
/helpers/concrete/urls.php
...and then define the following class within that file...
class SiteConcreteUrlsHelper extends ConcreteUrlsHelper { // Implement class here }
In other words, simply duplicating the core helper file to the corresponding site directory won't work like it does on other core files.
-Steve
In many cases this would be useful for models, libraries as well, but it hasn't matured that way.