<option value="nick" <?php $input->group_field == '' || $input->group_field == 'nick' ? print 'selected="selected"' : '' ?>><?php echo erTranslationClassLhTranslation::getInstance()->getTranslation('chat/lists/search_panel','Nick');?></option>
<option value="uagent" <?php $input->group_field == 'uagent' ? print 'selected="selected"' : '' ?>><?php echo erTranslationClassLhTranslation::getInstance()->getTranslation('chat/lists/search_panel','User Agent');?></option>
<option value="device_type" <?php $input->group_field == 'device_type' ? print 'selected="selected"' : '' ?>><?php echo erTranslationClassLhTranslation::getInstance()->getTranslation('chat/lists/search_panel','Device type');?></option>
<option value="department" <?php $input->group_field == 'department' ? print 'selected="selected"' : '' ?>><?php echo erTranslationClassLhTranslation::getInstance()->getTranslation('chat/lists/search_panel','Department');?></option>
<option value="user_id" <?php $input->group_field == 'user_id' ? print 'selected="selected"' : '' ?>><?php echo erTranslationClassLhTranslation::getInstance()->getTranslation('chat/lists/search_panel','Operator');?></option>
<option value="transfer_uid" <?php $input->group_field == 'transfer_uid' ? print 'selected="selected"' : '' ?>><?php echo erTranslationClassLhTranslation::getInstance()->getTranslation('chat/lists/search_panel','Operator who transferred a chat');?></option>
<option value="referrer" <?php $input->group_field == 'referrer' ? print 'selected="selected"' : '' ?>><?php echo erTranslationClassLhTranslation::getInstance()->getTranslation('chat/lists/search_panel','Page from which the customer came to the website.');?></option>
<option value="session_referrer" <?php $input->group_field == 'session_referrer' ? print 'selected="selected"' : '' ?>><?php echo erTranslationClassLhTranslation::getInstance()->getTranslation('chat/lists/search_panel','Web page from which chat was started');?></option>