Dynamischer Kategorienbaum funktioniert nicht, gibt zu wenig Kategorien aus

<li><h2>TEST...</h2>
<script type="text/javascript">
	function toggleCatDiv(id) {
		if (jQuery("#catTogglerDiv-"+id).is(":visible")) {
			jQuery("#catToggler-"+id).innerHTML="►";
		}
		else {
			jQuery("#catToggler-"+id).innerHTML="▼";
		}


		jQuery("#catTogglerDIV-"+id).slideToggle("normal");
	}
</script>
<?php
$args = array('orderby' => 'name', 'parent' => 0 );
$categories = get_categories( $args );


foreach ( $categories as $category ) {


?>
<span style="cursor:pointer" id="catToggler-<?php echo $category->cat_ID; ?>" onclick="toggleCatDiv('<?php echo $category->cat_ID; ?>')">►</span> <a href="<?php echo get_category_link( $category->term_id ); ?>"><?php echo $category->name;?></a><br />
<div id="catTogglerDIV-<?php echo $category->cat_ID; ?>" style="margin-left:3em;visibility:hidden">
	<?php
	$args = array(
	  'child_of'     => $category->cat_ID
	);
	get_categories($args);
	?>
</div>
<?php


}
?>
</li>

<li><h2>TEST...</h2>
<?php
$treenav = '<script type="text/javascript">
        function doToggle( id )
        {
            if ( jQuery( "#subCategories-" + id ).is( ":visible" ) )
                jQuery( "#catToggler-" + id ).html( "‣" );
            else
                jQuery( "#catToggler-" + id ).html( "▾" );


            jQuery( "#subCategories-" + id ).slideToggle( "normal" );
        }
    </script>';


$categories = get_categories( array(
    'orderby'    => 'name',
    'parent'     => 0,
    'hide_empty' => false
));


foreach ( $categories as $category )
    {
        $subcats = get_categories( array(
            'child_of'   => $category->cat_ID,
            'hide_empty' => false
        ));
        # Maybe useful
        if( !$subcats )
            $change_the_folding_indicator = 'ø';


        $treenav .= sprintf(
            '<span style="cursor:pointer" id="catToggler-%1$s" onclick="doToggle(\'%1$s\')">‣</span> <a href="%2$s">%3$s</a><br />
            <div id="subCategories-%1$s" style="margin-left:1em;display:none">',
            $category->cat_ID,
            get_category_link( $category->term_id ),
            $category->name
        );


        # Add this level only if subcats not empty
        if( $subcats )
            {
                foreach ( $subcats as $subcat )
                    {
                        $treenav .= sprintf(
                            '‣ <a href="%s">%s</a><br />',
                            get_category_link( $subcat->term_id ),
                            $subcat->name
                        );
                    }
            }
        $treenav .= '</div>';
    }
echo "<noscript><div style='display:none'></noscript>";
echo $treenav;
echo "<noscript></div></noscript>";
?>
				<noscript><ul>
<?php
				wp_list_categories('orderby=name&title_li=');
?>
				</ul></noscript>
			</li>