Magento: Custom Navigation Modification in renderer.phtml

<?php
/**
* Magento
*
* NOTICE OF LICENSE
*
* This source file is subject to the Academic Free License (AFL 3.0)
* that is bundled with this package in the file LICENSE_AFL.txt.
* It is also available through the world-wide-web at this URL:
* http://opensource.org/licenses/afl-3.0.php
* If you did not receive a copy of the license and are unable to
* obtain it through the world-wide-web, please send an email
* to license@magento.com so we can send you a copy immediately.
*
* DISCLAIMER
*
* Do not edit or add to this file if you wish to upgrade Magento to newer
* versions in the future. If you wish to customize Magento for your
* needs please refer to http://www.magento.com for more information.
*
* @category    design
* @package     rwd_default
* @copyright   Copyright (c) 2006-2014 X.commerce, Inc. (http://www.magento.com)
* @license     http://opensource.org/licenses/afl-3.0.php  Academic Free License (AFL 3.0)
*/

/** @var Mage_Page_Block_Html_Topmenu_Renderer $this */
/** @var Varien_Data_Tree_Node $menuTree */
/** @var string $childrenWrapClass */

$html = '';

$children = $menuTree->getChildren();
$parentLevel = $menuTree->getLevel();
$childLevel = is_null($parentLevel) ? 0 : $parentLevel + 1;

$counter = 1;

$childrenCount = $children->count();

$parentPositionClass = $menuTree->getPositionClass();
$itemPositionClassPrefix = $parentPositionClass ? $parentPositionClass . '-' : 'nav-';

foreach ($children as $child) {
$child->setLevel($childLevel);
$child->setIsFirst($counter == 1);
$child->setIsLast($counter == $childrenCount);
$child->setPositionClass($itemPositionClassPrefix . $counter);

$outermostClassCode = 'level'. $childLevel;
$_hasChildren = ($child->hasChildren()) ? 'has-children' : '';

$html .= '<li '. $this->_getRenderedMenuItemAttributes($child) .'>';

$html .= '<a href="'. $child->getUrl() .'" class="'. $outermostClassCode .' '. $_hasChildren .'">'. $this->escapeHtml($this->__($child->getName())) .'</a>';

if (!empty($childrenWrapClass)) {
$html .= '<div class="'. $childrenWrapClass .'">';
}

$nextChildLevel = $childLevel + 1;

if (!empty($_hasChildren)) {
$html .= '<div class="customenu"><ul class="level'. $childLevel .'">';
/*
$html .=     '<li class="level'. $nextChildLevel .' view-all">';
$html .=         '<a class="level'. $nextChildLevel .'" href="'. $child->getUrl() .'">';
$html .=             $this->__('View All') . ' ' . $this->escapeHtml($this->__($child->getName()));
$html .=         '</a>';
$html .=     '</li>';
*/
//$html .=     $this->render($child, $childrenWrapClass);
//$html .= '</ul>';
$catId = explode('-',$child->getId());
$category = Mage::getModel('catalog/category')->load($catId[2]);
//echo $category->getChildrenCount();
$childLevel2Category = Mage::getModel('catalog/category')->getCategories($catId[2]);
//echo $catId[2];


$count=floor(($category->getChildrenCount())/3);
$i=0;
foreach($childLevel2Category as $subchild)
{
$subcategory = Mage::getModel('catalog/category')->load($subchild->getId());
$html .= '<li class="subcat-last"><a class="level'. $nextChildLevel .'" href="'. $subcategory->getUrl() .'">'.$subchild->getName().'</a></li>';
$i++;
if($i%4==0)
{
$html .= '</ul><ul class="level'. $childLevel .'">';
}

}

$html .= '</ul></div>';
}

if (!empty($childrenWrapClass)) {
$html .= '</div>';
}

$html .= '</li>';

$counter++;


}

return $html;