Sort Jquery (multi sort tbody)

im having some problems need help with organise data in tables.
 using Jquery (tablesorter.) when click to <th> tag, it sorts data in the 1st tbody but then in the 2nd, 3rd, and so on... it does not work

I can't delete (<thead><td>Category</td></thead>) because I want it fixed in position and sort data in tag tr
example:
<table class="tablesorter">
<thead>
<th>name</th>
<th>city</th>
<th>address</th>
</thead>
<tbody>
<thead><td>Category</td></thead>
<tr>
<td>content1</td>
<td>content2</td>
...
</tr>
</tbody>

<tbody>
<thead><td>Category1</td></thead>
<tr>
<td>content1</td>
<td>content2</td>
...
</tr>
</tbody>
<tbody>
<thead><td>Category2</td></thead>
<tr>
<td>subCategory</td>
<td>subCategory</td>
...
</tr>
</tbody>
</table>

Please help me. Thanks
vt96Asked:
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basicinstinctCommented:
first thing, your html is bad

you can't have nested thead elements inside the tbody elements

for example, you can't have this:

<tbody>
<thead><td>Category</td></thead>
...
</tbody>

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vt96Author Commented:
Thanks your answer, but i want to sort data subcategory and my category is fixed in the positon. All subCategory (tbody 2nd )will sort below as tbody 1st.
You can preview link:
http://jsfiddle.net/8cg4f/115/
vt96Author Commented:
Thanks for your help.  Although I found another solution, if you have additional ideas or third party control, please let me know.
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