如何使用SMOF选项框架在wordpress上更改/制作动态Wordpress布局

Today starting to use "SMOF - Slightly Modded Options Framework(https://github.com/syamilmj/Options-Framework) " in a Wordpress theme(Twenty Twelve). I can properly use upload option of the framework. But now I try use "General Setings => Main Layout " . But I cannot understand it from framework documentation. So, Please give some tutorial link or real work example. Thanks to all & Sorry for my poor english.

<?php
$layout = $data['homepage_layout']['enabled'];

if ($layout):

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

    switch($key) {

    case 'block_one':
    ?>
    <!--do something here-->

    <?php
    break;
    case 'block_two':
    ?>
    <!--do something here-->

    <?php
    break;
    //repeat as many times necessary    

    }

}

endif;
?>