Hjälp med php meny.

Har lite problem med en drop-down meny på följande sida: http://viktorflume.com/

Vill att menyn ska fortsätta att vara öppen och inte stängas när man klickat in sig på en sida. Se t.ex. music>dolly parton.

Sidebar PHP:

<!-- Left site bar -->
<div id="wps-sidebar">

<h1><a href="<?php echo site_url('') ?>" title="<?php echo __('Home page', 'free01') ?>"><?php echo bloginfo( 'name' ); ?> </a> </h1>

<!-- Main menu -->
<div class="wpscls-menu-main">
<?php wp_nav_menu(array('menu' => __('Main menu', 'free01'), 'theme_location' => __('Main menu', 'free01'), 'depth' => 0, 'walker' => new extended_walker)); ?>
<div class="clr"></div>
</div>
<!-- /Main menu -->

<!-- Cate post -->
<div class="wpscls-cate-post">
<?php

$arrArgs = array(
'type' => 'post',
'child_of' => 0,
'orderby' => 'name',
'order' => 'ASC',
'taxonomy' => 'category',
'pad_counts' => false
);

$rows_cate = get_categories($arrArgs);
$strResult = '';
foreach($rows_cate as $numKey => $row_cate) {
$strResult .= '<h4 id="category-' . $row_cate->cat_ID . '">'.$row_cate->cat_name.'</h4>';

$arrArgs = array(
'cat' => $row_cate->cat_ID,
'posts_per_page' => 0,
'post_type' => '',
'orderby' => 'menu_order',
'order' => 'ASC'
);

$the_query = new WP_Query( $arrArgs );
$rows_tmp = $the_query->posts;

if (count($rows_tmp) > 0)
{
$strResult .= '<ul class="wpscls-cate-post-list category-' . $row_cate->cat_ID . '">';
foreach ($rows_tmp as $numKey01 => $row_tmp)
{
$strClass = 'wps-item' ;
$strClass .= (is_singular() && $row_tmp->ID == get_the_ID()) ? ' current' : '' ;
$strResult .= '<li>'.'<a href="'.get_permalink( $row_tmp->ID ).'" title="'.$row_tmp->post_title.'" class="'.$strClass.'">'.$row_tmp->post_title.'</a>'.'</li>';
}
$strResult .= '</ul>';
}
}
echo $strResult;
?>
<div class="clr"></div>
</div>
<!-- /Cate post -->

<!-- Copyright -->
<div class="wpscls-copyright">
<?php
$numStartYear = 2007;
$strYear = date('Y') > $numStartYear ? $numStartYear.' - '.date('Y') : $numStartYear;
?>
<?php echo sprintf(__('© %s'), $strYear) ?>
<br />
</div>
<!-- /Copyright -->

<div class="clr"></div>
</div>
<!-- /Left site bar -->