html head now showing in my plugin page... weird

<?php
/***********************************************************************

  Copyright (C) 2002-2005  Rickard Andersson (rickard@punbb.org)

  This file is part of PunBB.

  PunBB is free software; you can redistribute it and/or modify it
  under the terms of the GNU General Public License as published
  by the Free Software Foundation; either version 2 of the License,
  or (at your option) any later version.

  PunBB is distributed in the hope that it will be useful, but
  WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program; if not, write to the Free Software
  Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  MA  02111-1307  USA

************************************************************************/

##
##
##  A few notes of interest for aspiring plugin authors:
##
##  1. If you want to display a message via the message() function, you
##     must do so before calling generate_admin_menu($plugin).
##
##  2. Plugins are loaded by admin_loader.php and must not be
##     terminated (e.g. by calling exit()). After the plugin script has
##     finished, the loader script displays the footer, so don't worry
##     about that. Please note that terminating a plugin by calling
##     message() or redirect() is fine though.
##
##  3. The action attribute of any and all <form> tags and the target
##     URL for the redirect() function must be set to the value of
##     $_SERVER['REQUEST_URI']. This URL can however be extended to
##     include extra variables (like the addition of &foo=bar in
##     the form of this example plugin).
##
##  4. If your plugin is for administrators only, the filename must
##     have the prefix "AP_". If it is for both administrators and
##     moderators, use the prefix "AMP_". This example plugin has the
##     prefix "AMP_" and is therefore available for both admins and
##     moderators in the navigation menu.
##
##  5. Use _ instead of spaces in the file name.
##
##  6. Since plugin scripts are included from the PunBB script
##     admin_loader.php, you have access to all PunBB functions and
##     global variables (e.g. $db, $pun_config, $pun_user etc).
##
##  7. Do your best to keep the look and feel of your plugins' user
##     interface similar to the rest of the admin scripts. Feel free to
##     borrow markup and code from the admin scripts to use in your
##     plugins. If you create your own styles they need to be added to
##     the "base_admin" style sheet.
##
##  8. Plugins must be released under the GNU General Public License or
##     a GPL compatible license. Copy the GPL preamble at the top of
##     this file into your plugin script and alter the copyright notice
##     to refrect the author of the plugin (i.e. you).
##
##


// Make sure no one attempts to run this script "directly"
if (!defined('PUN'))
    exit;

// Tell admin_loader.php that this is indeed a plugin and that it is loaded
define('PUN_PLUGIN_LOADED', 1);

$filestring = file_get_contents("plugins/topiclists.txt");
$ids_forum_post = unserialize($filestring);


if (empty($ids_forum_post)){
    
    $query = "SELECT ".$db->prefix."forums.id, ".$db->prefix."forums.forum_name, ".$db->prefix."topics.subject, ".$db->prefix."posts.id FROM ".$db->prefix."forums, ".$db->prefix."topics, ".$db->prefix."posts WHERE ".$db->prefix."posts.id=$postid AND ".$db->prefix."forums.id=$forumid AND ".$db->prefix."posts.topic_id=".$db->prefix."topics.id";
    $result = $db->query($query);
    
    $list = $db->fetch_assoc($result);


}
    
    // Display the admin navigation menu
    generate_admin_menu($plugin);

?>
    <div id="exampleplugin" class="blockform">
        <h2><span>Topic list plugin</span></h2>
        <div class="box">
            <div class="inbox">
            <p>This plugin allows you to create topiclists by defining the forum you want to create a list of and the topic where the list should go. The topic must exist already. </p><p>PLEASE NOTE:All cotent in the topic will replaced by the new topiclist.</p>
            <p>
            <?php
            dump($list,$ids_forum_post);
            echo $query;
            
            
            ?>
            </p>
            </div>
        </div>

        <h2 class="block2"><span>Topic Lists</span></h2>
        <div class="box">
            <fieldset>
                <legend>Current topic lists</legend>
                <div class="infldset">
                    <table class="aligntop" cellspacing="0">
                        <tr>
                            <th scope="row">Forum</th>
                            <th scope="row">Topic</th>
                        </tr>
                    </table>
                </div>
            </fieldset>
            
            <form id="example" method="post" action="<?php echo $_SERVER['REQUEST_URI'] ?>&foo=bar">
                <div class="inform">
                    <fieldset>
                        <legend>Create a new Topiclist</legend>
                        <div class="infldset">
                        <table class="aligntop" cellspacing="0">
                            <tr>
                                <th scope="row">Forum ID:</th>
                                <td>
                                    <input type="text" name="forum_id_tolist" size="10" tabindex="1" />
                                </td>
                            </tr>
                            <tr>
                                <th scope="row">Post ID:</th>
                                <td>
                                    <input type="text" name="post_id_tolist" size="10" tabindex="2" />
                                </td>
                            </tr>
                            <tr>
                                <th scope="row"><input type="submit" name="newlist" value="create" tabindex="3" /></th>
                                
                            </tr>
                        </table>
                        </div>
                    </fieldset>
                </div>
            </form>
        </div>
    </div>
<?php


// Note that the script just ends here. The footer will be included by admin_loader.php.