URLs from 2.3 to 3.0

Hi people,

i'm trying to do a migration.

In this project there are lot of URLs without the the rule in routes, and is called directly from code.

For example i have A with the this link:

http://gsh.coexia.net/multi/work

And not works...

I must to change the capital letter of the controller Multi and it woks.

http://gsh.coexia.net/Multi/work

I need to change all the links of code and put the capital letter of controller?

Please i need help!! I can't change the URLs because is a old project and have lot of url indexed in google for example.

Thanks!!