使用Visual Composer无法正确显示发布内容

I have the following issue. I'm using Visual Composer for my website content. I decided to rebuild my header with VC too. I created a page called Header and created the header template there/ I've added the following code into my header to display the created page content (Header) there:

<?php 
    $id=14; 
    $post = get_post($id); 
    $content = apply_filters('the_content', $post->post_content); 
    echo $content;  
?>  

But it doesn't work correctly. Everything is fine with its content (texts, links, menu items etc) but it doesn't display background colors, paddings etc. What should I do? Thanks!