Widget: Seitennavigation mit ausklappbaren Unterseiten

<?php
/*
Plugin Name: TableOfContent
Plugin URI: http://hashdefineelectronics.com/2011/table-of-content-plugin/
Description: Plugin that can be used to displayed a table of content of your post/page as widget or inside your post. Please visit my homepage for more detail on using this plugin.
Version: 1.0.2
Author: Opticalworm, Ronald sousa
Author URI: http://www.hashdefineelectronics.com/
*/
// Global variable used to pass filter data over to widget
$TableContentData;
// register widget
add_action('widgets_init', 'TB_Init');
add_filter('the_content', 'TB_ContentFilter');
// our Widget Init
function TB_Init(){
    //Register Our new widget
    register_widget("TB_Widget");
}
class TB_Widget extends WP_Widget {
    // this is your widget contructor
    function TB_Widget(){
        parent::WP_Widget(false, $name = 'TB_Widget');    
    }
    // This function is called when your widget is used
    function widget($args, $instance){
        // is it a single page or post
        if(is_page() | is_single()){
            $mykey_values = get_post_custom_values('Tb_Title');
                // If variable exist then display table of content
                //if($mykey_values){            
                    global $TableContentData;
                    echo $TableContentData;
                //}
        }
    }
    // This is the function that called when user update the widget
    function update($new_instance, $old_instance) {    
        return $old_instance;
    }
    // This funciton when you want to edit widget
    function form($instance){                
    }
}
function TB_ContentFilter($content){
    // Get Table Title
    $Tb_Title = get_post_custom_values('Tb_Title');
    // If variable exist then display table of content
    //if( $Tb_Title & (is_single() | is_page()))
    //{    // Get table filter parameter, if not found then search for our default
        $Tb_Headers = get_post_custom_values('Tb_Headers');
        
        if($Tb_Headers){
            $SearchParameter = split(",",$Tb_Headers[0]);
        }
        else{
            $SearchParameter = split(",","1,2,3,4,5,6,7");
        }
        //sort our parameters
        sort($SearchParameter);
        // Get global data
        global $TableContentData;
        // Reset of allocate string space
        $TableContentData = "";
        // This funtion generate the link to pos/page header
        $TableContentData = TB_ContentGetList($content,$SearchParameter);
        //Is it empty? if so do nothing
        if($TableContentData){            
            // If user wants to add it to table content then put it there
            $content = str_replace("<!--PutTableHere-->", "<div id='TBC_Container'> <div id='TBC_ContainerTitle'>Page Content</div>". "<div id='TBC_Content'>" . $TableContentData . "</div>" . "</div>", $content);
            $TableContentData = "<div id='TBW_Container'> <div id='TBW_ContainerTitle'>Page Content</div>". "<div id='TBW_Content'>" . $TableContentData . "</div>" . "</div>";
        }        
    //}
    return $content;
}
function TB_ContentGetList(&$content, $HeaderParameter){
    //Creat Empty variables
    $HeaderNums = "";
    $ContentLink = "";
    $IndentLast = 1;
    //Creates a single string of header identifier. eg: "1234"
    foreach($HeaderParameter as $Num){
        $HeaderNums.= $Num;
    }
    //Setup header to search for our headers specified by user    
    if (preg_match_all('/<h(['.$HeaderNums.'])(.*?)>(.*?)(<\/h['.$HeaderNums.']>)/', $content, $Result)){
        // Start Table
        $ContentLink.="<ul id='TB_UL'>";
        // Go through each result and add to our list
        foreach ($Result[0] as $key => $title){
            //Get header text
            $HeaderText = strip_tags($Result[0][$key]);
            $HeaderTextA = strip_tags($Result[0][$key], '<a>');
            // If user assign an ID then get it so that we can add our on
            $TagIdRegexOutput = split('"',$Result[2][$key]);
            // Check if user has already set an id, if so use theres
            if($TagIdRegexOutput[0]){
                $TagRef = $TagIdRegexOutput[1];                        
            }
            else{
                $TagRef = $HeaderText;
            }
            //Set a level. 
            $IndentPosCurrent = $Result[1][$key];
            //Create link to header
            $ContentLink.='<li class="TB_Level' . $Result[1][$key] .'"><a class="TB_Link" href="#'.$TagRef.'">'.$HeaderText.'</a>'.'</li>';
            // Create header tag
            $HeaderTag = "h".$Result[1][$key];
            // Replace header in content with our assign id
            $content = str_replace($Result[0][$key], "<span"." id='$TagRef' "."></span><$HeaderTag>$HeaderTextA</$HeaderTag>", $content);                
        }
        // End List
        $ContentLink.="</ul> <!-- TB_Main-->";
    }
    return $ContentLink;
}
?>