title: Call block function from within controller in Magento
body: <p>How can i call the block function from the controller in the Magento.</p>
  
  <p>I have the bellow controller:</p>
  
  <p>Mage/checkout/controllers/CartController.php</p>
  
  <p>I want to call the bellow block function in this CartController</p>
  
  <p>Mage/checkout/Block/Cart/Shipping.php</p>
  
  <p>How can i do this? </p>
  
  <p>Thanks</p>