call function without parameters

[eluser]martin79[/eluser]
Hi Forum,

I am a bit confused setting up the structure of my app to be logical and
work fine with breadcrumps.

I have a controller, lets say

Code:

Country extends Controller{}

A country can have city tours, therefore I created a function

Code:

city_tours($tour){
if($tour=='some-tour'){...}
}

That will now create URLs like /country/city_tours/some-tour
If someone now just calls

Code:

/country/city_tours

I want to return a general view
about city tours or something like that.

But this now throws an "Missing argument" error, since the function

Code:

city_tours($tours){}

is expecting a parameter.

As far as I know PHP cannot overload functions and that wont let me create a function

Code:

city_tours()

.

Any ideas how to acomplish this? URL Rewrite?

Martin