Replace underscore (_) with dashes (-) in URL

[eluser]livewirerules[/eluser]
[quote author="TheFuzzy0ne" date="1364669682"]Please could you explain why you want to do that? Are you planning on changing the links on all of your pages so that they use hyphens instead of underscores? If anyone is linking to your site, that may break their links.

You're going to run into trouble if you do this, because you can't use hyphens in class/method names.

Just out of interest, what prompted the change of mind?[/quote]

The main reason is that (-) are better as in SEO perspective. Because dashes are treated as word separators and underscores are treated as word joiners.

My site is brand new, still on testing phase. the urls with _ looks very odd.

Those are the main reasons that i need to change the urls...