######################
public_navigation_main
######################

*****
Usage
*****

Modifies the top-level navigation for the public theme. 

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Value
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``array`` $nav

    An array of arrays as used by Zend_Navigation.
    

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Arguments
*********

None
    

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Examples
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To add a new link to a plugin's public interface, you would use this filter like this:     

.. code-block:: php

    public function filterPublicNavigationMain($nav) 
    {
        $nav[] = array(
                        'label' => __('My Plugin'),
                        'uri' => url('my-plugin')
                      );
        return $nav;
    }