How to apply fnFakeRowspan at multiple columns based on different value at 2nd columns

I have a table #firstTable with 10 rows and 7 column as below How to apply fnFakeRowspan() at 3rd to 7th columns (chp 1 to chp 5) based on different page number at 2nd column (page)

<table id="#firstTable">
  <thead>
    <tr> 
<th>name</th>
<th>page</th>
<th>chp 1 </th>
<th>chp 2 </th>
<th>chp 3 </th>
<th>chp 4 </th>
<th>chp 5 </th>
    </tr>
  </thead>
</table>