trying to updating multiple records with checkboxes but nothing updates

[eluser]umefarooq[/eluser]
well i have another solution if you like it will help you more fast, right now its updating all you records for approved and unapproved. here is my solution

just pass id to checkbox array value not as Associative array here is the code for solution

HTML

Code:

<form action="blog/admin/action">
     <input type="checkbox" name="approved[]" value="1" />
     <input type="checkbox" name="approved[]" value="2" />
     <input type="checkbox" name="approved[]" value="3" />
     <input type="submit" name="submit" value="approve" />
     <input type="submit" name="submit" value="unapprove" />
     </form>

controller

Code:

function action(){
    $task = $this->input->get_post('submit');
    switch($task){
     case 'approve':
       $this->approve(1);
     break;
     case 'unapprove':
        $this->approve(0);
     break;
   }
}

  function approve($approve = 1){
    $ids = $this->input->get_post(approved);
    if(!empty($ids)){
         foreach($ids as $id){
          $vanity_url->where('id',$id)->get();
          $vanity_url->approved = $approve;
          $vanity_url->save();
      }
    }
     redirect('anywhere');
  }

you can see i have use submit button with same name but value is different it will submit value of that button which we press, and always get the ids of checked boxes and update only specific record not the whole list of records