Seiten aus Klappmenü auschließen

<?php
function nrs_folding_pages($args){
    extract($args);
    //var_dump($args);
    $sort_opts = nrs_folding_pages_get_sort_opts();
    $options = get_option("nrs_folding_pages");
    $title = (empty($options["title"])) ? null : $options["title"];
 $sort_column = (array_key_exists($options["sort_column"],$sort_opts)) ? $options["sort_column"] : key($sort_opts);
 
    global $notfound;
 global $post;
 
 //returns a numerically indexed array...
 $pages = get_pages("sort_column=$sort_column");
 //a new associative array indexed by ID... 
 $nodes = array();
 foreach ($pages as $page) $nodes[$page->ID] = $page;
 //an array to hold the parent ids in the current tree...
 $parent_ids = array();
 if (is_page() and ($notfound != '1')) 
 {
  $curr_page_id = $post->ID;
  while ($curr_page_id)
  {
   array_unshift($parent_ids, $curr_page_id );
   $curr_page_id = $nodes[$curr_page_id]->post_parent;
  }
 }
 //add the top-level parent id, which is 0...
 array_unshift($parent_ids, 0 );
 
 //output...
 echo $before_widget;
 echo  $before_title . $title . $after_title;
 nrs_display_tree($parent_ids, $nodes, 0);
 echo $after_widget;
}
function nrs_display_tree($parent_ids, $nodes, $curr_id)
{
 global $post;
 if ($curr_id)
 {
  $node = $nodes[$curr_id];
  $title = wp_specialchars($node->post_title);
  $link = get_page_link($curr_id);
  $class = "page_item";
  if ($curr_id == $post->ID) $class .= " current_page_item";
  echo "<li class=\"$class\"><a href=\"$link\" title=\"$title\">$node->post_title</a>";
 }
 if (in_array($curr_id, $parent_ids)) 
 {
  $num_children = 0;
  foreach ($nodes as $node)
  {
   if ($node->post_parent == $curr_id) 
   {
    if (! $num_children) echo "\n<ul>";
    nrs_display_tree($parent_ids, $nodes, $node->ID);
    $num_children++;
   }
  }
  if ($num_children) echo "</ul>\n";
  
 }
 if ($curr_id) echo "</li>\n";
 
}


function nrs_folding_pages_get_sort_opts() {
 return array( "post_title"=>"Title",
     "menu_order"=>"Page Order");
}
function nrs_folding_pages_control() {
 $sort_opts = nrs_folding_pages_get_sort_opts();
    $options = get_option("nrs_folding_pages");
   
    if ( $_POST['nrs_folding_pages_submit'] ) 
    {
  $options['title'] = strip_tags(stripslashes($_POST['nrs_folding_pages_title']));
  $options['sort_column'] = (array_key_exists($_POST['nrs_folding_pages_sort_column'], $sort_opts)) ? $_POST['nrs_folding_pages_sort_column'] : key($sort_opts);
  update_option('nrs_folding_pages', $options);
    }
    $sort_column = (array_key_exists($options["sort_column"],$sort_opts)) ? $options["sort_column"] : key($sort_opts);
    $title = wp_specialchars($options['title']);
?>
 <input type="hidden" id="nrs_folding_pages_submit" name="nrs_folding_pages_submit" value="1" />
 <p><label for="nrs_folding_pages_title"><?php _e('Title:'); ?> <input style="width: 250px;" id="nrs_folding_pages_title" name="nrs_folding_pages_title" type="text" value="<?php echo $title; ?>" /></label></p>
 <p><label for="nrs_folding_pages_sort_column">
  <?php _e('Sort:'); ?> 
  <select  id="nrs_folding_pages_sort_column" name="nrs_folding_pages_sort_column">
  <?php
  foreach ($sort_opts as $val=>$label){
   echo "<option value=\"$val\"";
   if ($sort_column == $val) echo " selected";
   echo ">$label</option>";
  }
  ?>
  </select>
 </label></p>
 
<?php
}
function nrs_folding_pages_init()
{
    register_sidebar_widget("NRS Folding Pages", "nrs_folding_pages");
    register_widget_control("NRS Folding Pages", "nrs_folding_pages_control");
}
add_action("plugins_loaded", "nrs_folding_pages_init");
?>