如何以给定格式在会话数组中存储数据？

Category Name
  List A = Rm 20
  List B = Rm 50

Category Name
  List A = Rm 40

category Name
  List A = Rm 80
  List B = Rm 40
  List C = Rm 25

I tried

$_SESSION['info']=array('category'=>$category,'list'=>$list,'rate'=>$rate);

But it doesn't display as the format wanted. Can anyone help please?`

EDIT:

I think I didn't elaborate clearly.

The values for item category, list and rate come from user input.

SO I store them in variables like this:

php

$category[]=$_POST['category'];<br/>
$list[]=$_POST['list'];
$rate[]=$_POST['rate'];

storing in session array like this:

$_SESSION['info']]=array('level'=>$level,'subject'=>$subject2,'rate'=>$rate2);`

html

<input type="checkbox" name="category['category name']" id="category" class=category" value="1">

<input type="checkbox" name="list['category name']" id="list" value="'List id'">

<input type="textbox" name="rate['List name']" class="rate" value="" id="'List Name'">

Try the following:

$_SESSION['info'] = Array(
    'Category Name' => Array(
        'List A' => 'Rm 20', // don't forget "," if you're adding additional item.
        'List B' => 'Rm 50'
    ), 
    'Category Name' => Array(
        'List A' => 'Rm 40'
    )
    // Etc..
);