add extra field to Feature Details

Hey, i installed this plugin for the wootheme ‘For the Cause’.
I need an extra testfield in the feature plugin for naming a class; it’s to indicating a fontawesome icon.

How can i do that in my funstions.php file ?
Can it be done with a filter ?

It’s this function in ‘For the Cause’, the i-tag with the class icon-‘here comes the class’.


add_filter('woothemes_features_item_template', 'woo_custom_features_template');

if ( ! function_exists( 'woo_custom_features_template' ) ) {
function woo_custom_features_template( $tpl ) {
$tpl = '<div class="%%CLASS%%">%%IMAGE%%<div class="feature-content"><h3 class="feature-title">
<div class="post-type swatch-red">
<i class="icon-%%ICON%%"></i>
</div>%%TITLE%%</h3>%%CONTENT%%</div></div>';
return $tpl;
} // End woo_custom_features_template()
}

https://www.ads-software.com/plugins/features-by-woothemes/