Magento category programmatically tree view

$cat_mod = Mage::getModel('catalog/category')->load(2);
    $helper = Mage::helper('catalog/category');
    $_main_categories=$helper->getStoreCategories();
    echo cateList($_main_categories,0);
   
    function cateList($_main_categories,$out){
        $i=0;
           
        $cathtml='';
        //print_r($_main_categories);
        $lable='';
        foreach($_main_categories as $_category){
             if ($_category->getIsActive()){
               
                while($i<$out){
                    $space .= '   ';
                    $i++;
                }
                ?>
                getname();?>
                               
                $children = $_category->getChildren();
       
                $childrencount = $children->count();
                $hasChildren = $children && $children->count();
                if($hasChildren && $children->count())
                {
                    //echo "--->";
                    $out++;
                    cateList ($children,$out);
                    $out--;
                }
            }
           
           
           
   


























  
}
  

























 






















































      
        //return "df".$cathtml;
   
    }

?>

Magento add category programmatically

require_once 'app/Mage.php';

Mage::app('default'); // Default or your store view name.

//get a new category object

$category = Mage::getModel('catalog/category');

$category->setStoreId(0); // 0 = default/all store view. If you want to save data for a specific store view, replace 0 by Mage::app()->getStore()->getId().

//if update

if ($id) {

  $category->load($id);

}

$general['name'] = "My Category";

$general['path'] = "1/2/23"; // catalog path

$general['description'] = "Great My Category";

$general['meta_title'] = "My Category"; //Page title

$general['meta_keywords'] = "My , Category";

$general['meta_description'] = "Some description to be found by meta search robots. 2";

$general['landing_page'] = ""; //has to be created in advance, here comes id

$general['display_mode'] = "PRODUCTS_AND_PAGE"; //static block and the products are shown on the page

$general['is_active'] = 1;

$general['is_anchor'] = 0;

$general['page_layout'] = 'two_columns_left';

//$general['url_key'] = "cars";//url to be used for this category's page by magento.

//$general['image'] = "cars.jpg";

$category->addData($general);

try {

    $category->save();

    echo "Success! Id: ".$category->getId();

}

catch (Exception $e){

    echo $e->getMessage();

}