Posting Using Category Slug

/* Gravity Forms Posting */

add_action('gform_post_submission', 'gform_add_greenmy_home', 10, 2);
function gform_add_greenmy_home($entry, $form){

    if(!rgar($entry, 'post_id'))
        return;

    $post_id = rgar($entry, 'post_id');
    $valid_cat_ids = get_greenmy_home_ids();
    $cat_ids = array();

    foreach($form['fields'] as $field){

        if(strpos($field['cssClass'], 'add_greenmy_home') === false)
            continue;

        foreach($entry as $key => $value){

            if(intval($key) != $field['id'] || !in_array($value, $valid_cat_ids))
                continue;

            $cat_ids[] = (int) $value;

        }

    }

    wp_set_object_terms($post_id, $cat_ids, 'greenmy_home', false);

}

function get_greenmy_home_ids(){

    $categories = get_terms('greenmy_home', 'hide_empty=0');
    $cat_ids = array();

    foreach($categories as $category)
        $cat_ids[] = $category->term_id;

    return $cat_ids;
}

function print_greenmy_home($array){
    echo '<pre>';
    print_r($array);
    echo '</pre>';
}