Calling controller methods from inside view in Codeigniter

In controller:

function __construct()
{
    parent::__construct(); 

    $this->method_call =& get_instance();

}  

function checkChildExists($parent_id)

{
    return $this->home_model->checkChildExists($parent_id);
} 

In view

$checkChildExists = $this->method_call->checkChildExists($parent_id);