Put in the widgets in the layout. Your view does not stand alone on a page, it usually stays in a layout. In the view (well not really but for the sake of the argument) I do
<?php
$this->breadcrumbs = array(
array('name' => 'Home', 'url' => array('/')),
array('name' => ($this->model->isNewRecord ? 'Create ' : 'Update ') . 'Contact',
);
?>
I can then do in the layout
<?php $this->widget('MyBreadCrumbs', array(
'crumbs' => $this->breadcrumbs,
)); ?>
Read more about the rendering process here: http://www.yiiframework.com/wiki/249/understanding-the-view-rendering-flow/