Custom name for dropdown generated by formhelper

I'm building a CMS system with a module called "CmsPage' (list, add, edit, sort delete). Every cms page links via a <select></select> to another cms page and it tells which record the parent cms page is.

The select dropdown holds all the values from the table "cms_pages". 

Here's my add.php with the form helper that shows a list with cms pages:

<?php

echo $this->Form->create('CmsPage', array(

    'type' => 'file',

    'novalidate' => true,

    'inputDefaults' => array(

        'label' => true,

        'div' => 'form-group',

        'class' => 'form-control'

    ),

    'role' => 'form'

));

echo $this->Form->inputs(array(

    'legend' => false,

    'name' => array(

        'label' => 'Naam'

    ),

    'cmsPages' => array(

        'label' => 'Parent CMS page'

    ),

    'plugin' => array(

        'label' => 'Plugin'

    ),

    'controller' => array(

        'label' => 'Controller'

    ),

    'action' => array(

        'label' => 'Action'

    )

));

echo $this->Form->end('Save');

?>

Naming conventions require that the name of the <select> should be"cmsPages". But hey, I want to call it "parentNode"!

But when I do so, the dropdown changes in a simple textfield instead of the <select> dropdown.

Is to rename the red marked word above to "parentNode"? If yes... How? ;)

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