Сортировка в обратном порядке. Как? - JoomGallery

div class="jg_catorderlist">
      <form action="<?php echo $this->sort_url;?>" method="post">
          <?php echo JText::_('JGS_CATEGORY_OPTION_USER_ORDERBY'); ?>
        <select title="<?php echo JText::_('JGS_CATEGORY_OPTION_USER_ORDERBY'); ?>" name="orderby" onchange="this.form.submit()" class="inputbox">
          <option value="default"><?php echo JText::_('JGS_CATEGORY_OPTION_USER_ORDERBY_DEFAULT'); ?></option>
<?php   if(strpos($this->_config->get('jg_usercatorderlist'), 'date')!== false): ?>
          <option <?php if($this->order_by == 'date') echo 'selected="selected"'; ?> value="date"><?php echo JText::_('JGS_CATEGORY_OPTION_USER_ORDERBY_DATE'); ?></option>
<?php   endif;
        if(strpos($this->_config->get('jg_usercatorderlist'), 'user')!== false): ?>
          <option <?php if($this->order_by == 'user') echo 'selected="selected"'; ?> value="user"><?php echo JText::_('JGS_CATEGORY_OPTION_USER_ORDERBY_AUTHOR'); ?></option>
<?php   endif;
        if(strpos($this->_config->get('jg_usercatorderlist'), 'title')!== false): ?>
          <option <?php if($this->order_by == 'title') echo 'selected="selected"'; ?> value="title"><?php echo JText::_('JGS_CATEGORY_OPTION_USER_ORDERBY_TITLE'); ?></option>
<?php   endif;
        if(strpos($this->_config->get('jg_usercatorderlist'), 'hits')!== false): ?>
          <option <?php if($this->order_by == 'hits') echo 'selected="selected"'; ?> value="hits"><?php echo JText::_('JGS_CATEGORY_OPTION_USER_ORDERBY_HITS'); ?></option>
<?php   endif;
        if(strpos($this->_config->get('jg_usercatorderlist'), 'rating')!== false): ?>
          <option <?php if($this->order_by == 'rating') echo 'selected="selected"'; ?> value="rating"><?php echo JText::_('JGS_CATEGORY_OPTION_USER_ORDERBY_RATING'); ?></option>
<?php   endif; ?>
        </select>
<?php   $disabled = '';
        if($this->order_by != 'title' && $this->order_by != 'hits' && $this->order_by != 'date' && $this->order_by != 'user' && $this->order_by != 'rating'):
          $disabled = ' disabled="disabled"';
        endif; ?>
        <select<?php echo $disabled; ?> title="orderdir" name="orderdir" onchange="this.form.submit()" class="inputbox">
          <option <?php if ($this->order_dir == 'asc') echo 'selected="selected"' ?> value="asc"><?php echo JText::_('JGS_CATEGORY_OPTION_USER_ORDERBY_ASC'); ?></option>
          <option <?php if ($this->order_dir == 'desc') echo 'selected="selected"' ?> value="desc"><?php echo JText::_('JGS_CATEGORY_OPTION_USER_ORDERBY_DESC'); ?></option>

 $user_orderby   = JRequest::getCmd('orderby');
      $user_orderdir  = JRequest::getCmd('orderdir');