Help centering a widget's content

[worried]

On the template: vbcms_widget_execphp_page

<div class="cms_widget">
<div class="block">
<div class="cms_widget_header">
    <h3>{vb:raw title}</h3>
</div>
<div class="cms_widget_content">
{vb:raw output}
</div>
</div>
</div>

I cannot get "{vb:raw output}" to center using center tags. The result is the picture always aligns on the left.