i`m using unset to delete first two option values but i need it to be default, how to do this?? thanks

function filter_function_name($input_object, $sfid)
{
if($input_object[‘name’]==’_sft_tax_news’)
{
/*foreach($input_object[‘options’] as $option)
{
if($option->value==”maironio-lietuviu-literaturos-muziejus”)
{
$option->label = “AAA”;
$option->attributes[‘class’] = “sf-option-active”;
$option->attributes[‘selected’] = “selected”;
}
}*/
unset($input_object[‘options’][0]);
unset($input_object[‘options’][1]);
return $input_object;
//udpate this field before rendering
}
else{
echo “NOOO!”;
return $input_object;
}
}
add_filter(‘sf_input_object_pre’, ‘filter_function_name’, 10, 2);

filter_function_name(array(‘name’ => ‘_sft_tax_news’),17402);