<div id="<?php echo $widgets1 ?>">
A
</div>

<div id="<?php echo $widgets2 ?>">
B
</div>

然后在CSS中设置:

[code=CSS]
#a {
display:none;
}

#b {
display:none;
}

#a1 {
}

#b1 {
}

   if(isset($_COOKIE['events'])) {
      $widgets1 = $_COOKIE['events'];
   } else {
      $widgets1 = "eventsshow";
      
   }
   
   if(isset($_COOKIE['friends'])) {
      $widgets2 = $_COOKIE['friends'];
   } else {
      $widgets2 = "friendsshow";
      
   }

   <fieldset>
      <legend>Widgets</legend>
      <input type="checkbox" value="eventsshow"  <?php
                 if($events == "eventsshow")
                    echo "checked";
      ?>></input>
      <label>events</label>
      <br/>
      <input type="checkbox" value="friendsshow"  <?php
                 if($friends == "friendsshow")
                    echo "checked";
      ?>></input>
      <label>friends</label>
      </fieldset>
      
      
       
              </form>
              <input type="submit">

?>