if ( $hierarchical )
			$depth = $r['depth'];
		else
			$depth = -1; // Flat.
    foreach ( $categories as  $key => $category ) {
     if ($category->term_id == 4 || $category->term_id == 10 || $category->term_id == 1 ) unset ($categories[ $key ]) ;
    }
		$output .= walk_category_tree( $categories, $depth, $r );
	}

	if ( $title_li && 'list' == $style )
		$output .= '</ul></li>';

	$output = apply_filters( 'wp_list_categories', $output, $args );

	if ( $echo )
		echo $output;
	else
		return $output;
}