gistfile1.aw

Called like so:

echo $this->element('Crud/index', array(
       'model' => 'ContentPage',
       'columns' => array(
               'name' => function($View, $item, $model) { return $View->Html->link($item[$model]['name'], array('action' => 'index', $item[$model]['id'])); },
               'is_active',
               'is_default',
       ),
       'row_actions' => array(
               '10_view'       => function($View, $item, $model) { return $View->Html->link(__d('common', 'View'), array('action' => 'index', $item[$model]['id']), array('class' => 'btn')); },
               '20_edit'       => function($View, $item, $model) { return $View->Html->link(__d('common', 'Configure'), array('action' => 'edit', $item[$model]['id']), array('class' => 'btn')); },
               '30_delete'       => function($View, $item, $model) { return $View->Html->link(__d('common', 'delete'), array('action' => 'delete', $item[$model]['id']), array('class' => 'btn')); }
       )
), array(
       'plugin' => 'SharedPlugin'
));

change in CRUD/index.ctp :

if(is_callable($settings)) {
	$entry = call_user_func($settings, $this, $item, $model, $baseUrl);
} else if (strstr($column, '.')) {// If dot notation
	$entry = Set::extract($column, $item);
} else {
	$entry = $item[$model][$column];
}