$(function(){

  $("table").tablesorter({
    theme : 'blue',
    sortList : [[1,0]],
    widgets: ['group', 'filter'],
    widgetOptions: {
      group_collapsible : true,
      group_collapsed   : false,
      group_count       : false,
      filter_childRows  : true,
    }
  });

  $('.tablesorter-childRow td').hide();

  $('.tablesorter').delegate('.toggle', 'click' ,function(){
    $(this).closest('tr').nextUntil('tr:not(.tablesorter-childRow)').find('td').toggle();
    return false;
  });

});

/* extra css needed because there are 5 child rows */
/* no zebra striping */
.tablesorter-blue tbody > tr:hover + tr.tablesorter-childRow + tr.tablesorter-childRow + tr.tablesorter-childRow > td,
.tablesorter-blue tbody > tr:hover + tr.tablesorter-childRow + tr.tablesorter-childRow + tr.tablesorter-childRow + tr.tablesorter-childRow > td,
.tablesorter-blue tbody > tr:hover + tr.tablesorter-childRow + tr.tablesorter-childRow + tr.tablesorter-childRow + tr.tablesorter-childRow + tr.tablesorter-childRow > td,
/* with zebra striping */
.tablesorter-blue tbody > tr.even:hover + tr.tablesorter-childRow + tr.tablesorter-childRow + tr.tablesorter-childRow + tr.tablesorter-childRow > td
.tablesorter-blue tbody > tr.even:hover + tr.tablesorter-childRow + tr.tablesorter-childRow + tr.tablesorter-childRow + tr.tablesorter-childRow + tr.tablesorter-childRow > td
.tablesorter-blue tbody > tr.even:hover + tr.tablesorter-childRow + tr.tablesorter-childRow + tr.tablesorter-childRow + tr.tablesorter-childRow > td,
.tablesorter-blue tbody > tr.even:hover + tr.tablesorter-childRow + tr.tablesorter-childRow + tr.tablesorter-childRow + tr.tablesorter-childRow + tr.tablesorter-childRow > td {
  background: #d9d9d9;
}
.tablesorter-blue tbody > tr.odd:hover + tr.tablesorter-childRow + tr.tablesorter-childRow + tr.tablesorter-childRow > td,
.tablesorter-blue tbody > tr.odd:hover + tr.tablesorter-childRow + tr.tablesorter-childRow + tr.tablesorter-childRow + tr.tablesorter-childRow > td,
.tablesorter-blue tbody > tr.odd:hover + tr.tablesorter-childRow + tr.tablesorter-childRow + tr.tablesorter-childRow + tr.tablesorter-childRow + tr.tablesorter-childRow > td {
  background: #bfbfbf;
}

/* Grouping widget css */
tr.group-header td {
  background: #eee;
}
.group-name {
  text-transform: uppercase;
  font-weight: bold;
}
.group-count {
  color: #999;
}
.group-hidden {
  display: none !important;
}
.group-header, .group-header td {
  user-select: none;
  -moz-user-select: none;
}
/* collapsed arrow */
tr.group-header td i {
  display: inline-block;
  width: 0;
  height: 0;
  border-top: 4px solid transparent;
  border-bottom: 4px solid #888;
  border-right: 4px solid #888;
  border-left: 4px solid transparent;
  margin-right: 7px;
  user-select: none;
  -moz-user-select: none;
}
tr.group-header.collapsed td i {
  border-top: 5px solid transparent;
  border-bottom: 5px solid transparent;
  border-left: 5px solid #888;
  border-right: 0;
  margin-right: 10px;
}

<table class="tablesorter">
  <thead>
    <tr>
      <th class="Customer group-false"></th>
      <th class="group-word">Order</th>
      <th class="group-false">Status</th>
      <th class="group-false">Priority</th>
      <th class="group-false">Price</th>
    </tr>
  </thead>
  <tbody>

    <tr><td rowspan="3"><a href="#" class="toggle">Good Toys</a></td><td>USA</td><td>80%</td><td></td><td></td></tr>
    <tr class="tablesorter-childRow"><td>1561651</td><td>finish</td><td>0</td><td>$5</td></tr>
    <tr class="tablesorter-childRow"><td>558815</td><td>finish</td><td>0</td><td>$55</td></tr>

    <tr><td rowspan="3"><a href="#" class="toggle">Cycle Clearance</a></td><td>FRANCE</td><td>25%</td><td></td><td></td></tr>
    <tr class="tablesorter-childRow"><td>21485213</td><td>in progress</td><td>2</td><td>$7</td></tr>
    <tr class="tablesorter-childRow"><td>12547854</td><td>finish</td><td>0</td><td>$18</td></tr>

    <tr><td rowspan="5"><a href="#" class="toggle">Cycle Initial Bike Company</a></td><td>USA</td><td>36%</td><td></td><td></td></tr>
    <tr class="tablesorter-childRow"><td>12574521</td><td>in progress</td><td>1</td><td>$5</td></tr>
    <tr class="tablesorter-childRow"><td>7895452</td><td>in progress</td><td>2</td><td>$78</td></tr>
    <tr class="tablesorter-childRow"><td>1542021</td><td>finish</td><td>0</td><td>$28</td></tr>
    <tr class="tablesorter-childRow"><td>4489885</td><td>finish</td><td>0</td><td>$18</td></tr>

    <tr><td rowspan="5"><a href="#" class="toggle">Sports Store</a></td><td>USA</td><td>90%</td><td></td><td></td></tr>
    <tr class="tablesorter-childRow"><td>18915</td><td>in progress</td><td>2</td><td>$5</td></tr>
    <tr class="tablesorter-childRow"><td>5402574</td><td>in progress</td><td>2</td><td>$78</td></tr>
    <tr class="tablesorter-childRow"><td>26478</td><td>finish</td><td>0</td><td>$28</td></tr>
    <tr class="tablesorter-childRow"><td>25682</td><td>finish</td><td>0</td><td>$18</td></tr>

    <tr><td rowspan="5"><a href="#" class="toggle">Locks Company</a></td><td>UK</td><td>24%</td><td></td><td></td></tr>
    <tr class="tablesorter-childRow"><td>18915</td><td>in progress</td><td>2</td><td>$5</td></tr>
    <tr class="tablesorter-childRow"><td>5402574</td><td>in progress</td><td>1</td><td>$78</td></tr>
    <tr class="tablesorter-childRow"><td>26478</td><td>finish</td><td>0</td><td>$28</td></tr>
    <tr class="tablesorter-childRow"><td>25682</td><td>finish</td><td>0</td><td>$18</td></tr>

    <tr><td rowspan="3"><a href="#" class="toggle">Famous Bike Shop</a></td><td>UK</td><td>12%</td><td></td><td></td></tr>
    <tr class="tablesorter-childRow"><td>185406</td><td>in progress</td><td>2</td><td>$5</td></tr>
    <tr class="tablesorter-childRow"><td>541265</td><td>in progress</td><td>2</td><td>$78</td></tr>

  </tbody>
</table>