codeigniter控制器和视图不工作

Question

I have a question about CodeIgniter and how to get some information from some tables using a controller and then have it displayed in a view

I have it working using 6 tables, but I've changed the layout of the database and the names of the tables and I can't quite work out how to change the code to have it working again and I'm hoping it will be an easy 'find' for someone to look at and give me some pointers.

It has a couple of errors of

Message: Undefined variable: cluster_task

And then one for the date of

Message: Undefined index:item_date

Complaining about the view, but there’s probably the way I’ve defined in the controller, and I have tried changing it about 100 times and I cant see where the error(s) are?

This is what it comes out with in browser

From 3 June 2015 to 5 June 2015
Date        Support Item        Ref Number      Hours       Price       Cost    
4 June 2015                                         
3 June 2015                                         
5 June 2015                                         
5 June 2015                                         
1 January 1970  

The controller code is – there’s more but this should be the relevant part =

        $items = new Cluster_task();
        $items->where_in('id', $cluster_task_ids)->order_by('id', 'asc')->get();

         $cluster_task_id_count = array_count_values($cluster_task_ids);

        $dates = new List_item();
        $dates->where_in('user_list_id', $id)->where('item_date >=', $start)->where('item_date <=', $end)->order_by('cluster_task_id', 'asc')->get();
        if($items->exists()) {
           echo $data['item_count_item'] = $items->result_count();  
            $data['items'] = $items;   
            $data['dates'] = array();
            foreach($dates AS $date)
            {
              $data['dates'][$date->id] = array('item_date' => $date->item_date, 'cluster_tasks' => array());
            }  
            foreach($items AS $item)
            {
                for($count = 0; $count < $cluster_task_id_count[$item->id]; $count++)
                {
                        $data['dates'][$item->cluster_task_id]['cluster_tasks'][$item->cluster_task_id] = array(
                            'name' => $item->cluster_task_support_item
                        );
                }
            }
        }         
        $data['start'] = $start;
        $data['end'] = $end; 
        $this->cfd->build('diet/preview_claim', $data);

And the view code is – again, there’s more but this should be the relevant part =

<table class="atable">
<tr>
  <th colspan="12">From <?php echo date('j F Y', strtotime($start)) ?> to <?php echo date('j F Y', strtotime($end)) ?></th>
</tr>
<tr>
<td>Date</td>
<td>Support Item</td>
<td>Ref Number</td>
<td>Hours</td>
<td>Price</td>
<td>Cost</td>
</tr>

<?php
foreach($dates AS $date) {             
    $date = $date['item_date'];        //item_categories - name ie fruit
     echo '<td class="special_column1">'.date('j F Y',    strtotime($date)).'</td>';
foreach($date['cluster_tasks'] AS $cluster_task)    
{
        echo '<tr>';
        echo '<td class="special_column1">'.date('j F Y', strtotime($date)).'</td>';
        echo '<td class="special_column3">'.$cluster_task['name'].'</td>';
        echo '</tr>';
        $name = '';
   }
}
?>
</table>

thanks so much for your time.