Provide a simple textfield for equality
Overrides FilterPluginBase::value_form
function value_form(&$form, &$form_state) {
$form['value'] = array(
'#type' => 'textfield',
'#size' => 15,
'#default_value' => $this->value,
'#attributes' => array(
'title' => t('Enter the terms you wish to search for.'),
),
'#title' => empty($form_state['exposed']) ? t('Value') : '',
);
}