$food = array();
$food[0]['fruits'][0]['fruits1'] = '苹果1';
$food[0]['fruits'][0]['fruits2'] = '桔子1';
$food[0]['fruits'][0]['fruits3'] = '香蕉1';
$food[0]['vegetables'] = '白菜1';
$food[1]['fruits'][1]['fruits1'] = '苹果2';
$food[1]['fruits'][1]['fruits2'] = '桔子2';
$food[1]['fruits'][1]['fruits3'] = '香蕉2';
$food[1]['vegetables'] = '白菜2';

Array
(
  [0] => Array
    (
      [fruits] => Array
        (
          [0] => Array
            (
              [fruits1] => 苹果1
              [fruits2] => 桔子1
              [fruits3] => 香蕉1
            )
        )
      [vegetables] => 白菜1
    )
  [1] => Array
    (
      [fruits] => Array
        (
          [1] => Array
            (
              [fruits1] => 苹果2
              [fruits2] => 桔子2
              [fruits3] => 香蕉2
            )
        )
      [vegetables] => 白菜2
    )
)

$this->assign( "food", $food );
$this->display();

<p>食物品种：</p><br />
<volist name="food" id="vo">
 <volist name="vo['fruits']" id="f">
 <p>水果1：{$f['fruits1']}</p>
 <p>水果2：{$f['fruits2']}</p>
 <p>水果3：{$f['fruits3']}</p>
 </volist>
 <p>蔬菜：{$vo['vegetables']}</p><br />
</volist>

食物品种：

水果1：苹果1
水果2：桔子1
水果3：香蕉1
蔬菜：白菜1

水果1：苹果2
水果2：桔子2
水果3：香蕉2
蔬菜：白菜2