Tablesorter: don't show specific column values as filters - tablesorter

Question

Is there a way to remove a column value as a filter on a column that has a "filter-select" attribute.
Here's an example from #mottie in jsfiddle
http://jsfiddle.net/Mottie/856bzzeL/1085/. I just added a "filter-select" on column Animal column. is there a way for example to remove Koala from the drop down filter values?
HTML
<table class="tablesorter">
<thead>
<tr>
<th>AlphaNumeric</th>
<th>Numeric</th>
<th class="filter-match filter-select">Animals</th>
<th>Sites</th>
</tr>
</thead>
<tbody>
<tr>
<td>abc 123</td>
<td>10</td>
<td>Koala</td>
<td>http://www.google.com</td>
</tr>
<tr>
<td>abc 1</td>
<td>234</td>
<td>Ox</td>
<td>http://www.yahoo.com</td>
</tr>
<tr>
<td>abc 9</td>
<td>10</td>
<td>Girafee</td>
<td>http://www.facebook.com</td>
</tr>
<tr>
<td>zyx 24</td>
<td>767</td>
<td>Bison</td>
<td>http://www.whitehouse.gov/</td>
</tr>
<tr>
<td>abc 11</td>
<td>3</td>
<td>Chimp</td>
<td>http://www.ucla.edu/</td>
</tr>
</tbody>
Script: Tablesorter
/* Documentation for this tablesorter FORK can be found at
* http://mottie.github.io/tablesorter/docs/
*/
// See http://stackoverflow.com/q/40899404/145346
$(function(){
$('table').tablesorter({
theme: 'blue',
widgets: ['zebra', 'filter'],
widgetOptions: {
filter_defaultFilter: {
// Ox will always show
2: '{q}|Ox'
}
}
});
});

Answer 1

In this case, you will need the filter_selectSource option to manipulate the options of the select (demo)
$(function() {
$('table').tablesorter({
theme: 'blue',
widgets: ['zebra', 'filter'],
widgetOptions: {
filter_defaultFilter: {
// Ox will always show
2: '{q}|Ox'
},
filter_selectSource: function(table, column, onlyAvail) {
// get an array of all table cell contents for a table column
var array = $.tablesorter.filter.getOptions(table, column, onlyAvail);
// remove Koala (multiple entries) from array
return $.grep(array, function(animal) {
return animal !== "Koala";
});
}
}
});
});