Handler data before return

This is my simple implementation for custom data before return base on data type. In case I have many many type I want to know what is the best solutions for route to expected handler function. I don't want to use too muchswitch or if-else .Could you guys take a look at this code and tell me any suggestion, Is there any other way to handler data before return? Thank you

function A($data) {

}

function B($data) {
}

function bill($data) {
    return converter($data, $type)
}

function converter($data, $type) {
    if ($type == 'A')
    {
        return A($data);
    } else {
        return B($data);
    }
}

p/s my English is not good . Sorry about that.