URI change when calling controller functions

[eluser]Bondergaard[/eluser]
Hi
I have a form with several submit buttons for different actions. The way I handle that is that I have a function in my controller that checks the submit button value and call the appropriate function in the controller. It works fine, but when I submit the form the url is index.php/controller/handler and I want it to be index.php/controller/functionA if the first submit button is clicked and so on. I know that I can do it with a redirect, but then all the post variables from the form is not passed to it. Is there a way to do that?

The code below is just an example.

Form:

Code:

<form action="controller/handler" method="POST">
<input type="hidden" name="beverage" value="water" />
<input type="submit" name="formAction" value="a" />
<input type="submit" name="formAction" value="b" />
</form>

Controller:

Code:

function handler()
{
$action = $this->input->post('formAction');

if($action == 'a')
  $this->functionA(); //Works but url is still controller/handler
  redirect('controller/functionA'); //URL is correct but the post variable is not passed
if($action == 'b')
  $this->functionB();
}

functionA()
{
  echo $this->input->post('beverage');
}

functionB()
{
  echo $this->input->post('beverage');
}