If we are required to Create elements and add it in layouts and views  ithe can do it as In app/views/elements folder create an element file adminsidebar.ctp with the below code :

<?php
echo Hello Cakephp !!;
?>

Call the element In the view file or layout file as 

<?php echo $this->element('adminsidebar'); ?>

If we want to pass parameters to the elements we can do it with the element() functions  as : 

<?php echo
$this->element('helpbox',
array("helptext" => "this text ishelpful."));
?>

In the element file, tthe passed variables are available. In the above example, the /app/views/elements/helpbox.ctp file can use the $helptext variable. 

<?php
echo $helptext; "
?>

outputs :  "this text is helpful"