change Gravity Forms checkbox structure so it doesn't use the extra ul and li's

rw_change_checkbox_structure.php

add_filter( 'gform_field_input', 'rw_change_checkbox_structure', 10, 5 );
function rw_change_checkbox_structure($input, $field, $value, $lead_id, $form_id){
    $input_type = RGFormsModel::get_input_type($field);
    if($input_type != "checkbox" || IS_ADMIN && RG_CURRENT_VIEW == "entry")
        return $input;

    $choices = "";

    if(is_array($field["choices"])){
        $choice_number = 1;
        $count = 1;

        $logic_event = !empty($field["conditionalLogicFields"]) ? "onclick='gf_apply_rules(" . $form_id . "," . GFCommon::json_encode($field["conditionalLogicFields"]) . ");'" : "";
        $disabled_text = (IS_ADMIN && RG_CURRENT_VIEW != "entry") ? "disabled='disabled'" : "";

        foreach($field["choices"] as $choice){
            if($choice_number % 10 == 0) //hack to skip numbers ending in 0. so that 5.1 doesn't conflict with 5.10
                $choice_number++;

            $input_id = $field["id"] . '.' . $choice_number;
            $id = $field["id"] . '_' . $choice_number++;

            if(empty($_POST) && rgar($choice,"isSelected")){
                $checked = "checked='checked'";
            }
            else if(is_array($value) && RGFormsModel::choice_value_match($field, $choice, rgget($input_id, $value))){
                $checked = "checked='checked'";
            }
            else if(!is_array($value) && RGFormsModel::choice_value_match($field, $choice, $value)){
                $checked = "checked='checked'";
            }
            else{
                $checked = "";
            }

            $tabindex = GFCommon::get_tabindex();
            $choice_value = $choice["value"];
            if(rgget("enablePrice", $field))
                $choice_value .= "|" . GFCommon::to_number(rgar($choice,"price"));

            $label = sprintf("<label for='choice_%s'>%s</label>", $id, $choice["text"]);

            $choices .= sprintf("<input name='input_%s' type='checkbox' $logic_event value='%s' %s id='choice_%s' $tabindex %s />%s", $input_id, esc_attr($choice_value), $checked, $id, $disabled_text, $label);

            if(IS_ADMIN && RG_CURRENT_VIEW != "entry" && $count >=5)
                break;

            $count++;
        }

        $total = sizeof($field["choices"]);
        if($count < $total)
            $choices .= "<div class='gchoice_total'>" . sprintf(__("%d of %d items shown. Edit field to view all", "gravityforms"), $count, $total) . "</div>";
    }

    $field_id = "input_{$form_id}_{$field["id"]}";

    return sprintf("<div class='ginput_container'><div class='gfield_checkbox' id='%s'>%s</div></div>", $field_id, $choices);
}