Controller Names with Dashes or Underscores?

[eluser]aidehua[/eluser]
Forget search engine friendliness for a minute. I think

example.com/about-us

is more human-friendly than

example.com/about_us

For now I'm using routes to achieve this:

Code:

$route['about-us'] = "about_us";

But it could get tedious if I have dozens of pages to set up like that:

Code:

$route['about-us'] = "about_us";
$route['contact-us'] = "contact_us";
$route['terms-and-conditions'] = "terms_and_conditions";

etc.

(You might say that these are trivial examples, and the pages could simply be re-named "about", "contact", and "terms" with no loss of usability - but there will be cases when I really do want to keep the dashes in the URI.)

And what if I'm creating pages (and URIs) dynamically through a content management system? Should I be writing a new line to my routes.php file automatically when I create a new page through the CMS? That feels a bit clunky.

If I were clever with regular expressions, maybe I could write something in routes.php that does this:

Code:

$route['[string-with-dashes-in-first-or-second-uri-segment'] = "[string-with-underscores-in-first-or-second-uri-segment]";

But I'm not clever with regular expressions.

(Anyone?)

Or would it be better to do this by customising the router library?