How to build a div that do not interferes with the prestashop module blocks?

[magicball]

Hi, i'm customizing my homepage with a few divs inside the default center_column div in the header.tpl file:

Eg:

{if $page_name == 'index'}

{/if}

The problem is that if for example i want the Text Editor Block Module just below/after my own div the mess is coming..

The module goes under my div and is not visualised correctly, it's like if my div is not positioned correctly in document flux..

Thank you in advance!