// IndexController.php
public function widgetenabledoutputAction() {
  $html = "<ul>";
  for ($i = 1; $i <= 5; $i++) {
    echo "<li>Item $i</li>";
  }
  $html .= "</ul>";
  $this->view->html = $html;     
}
 
// index action view script (index.phtml), notice we are not calling widgetenabledoutputAction but can get output from it
echo $this->action(
  $action = "widgetenabledoutput",
  $controller = "index",
  $module = null,
  array(
    "itemsPerPage" => 2 // can pass params as array
  )
);