Convert Wordpress caption tag to html div tag

caption-to-div.php

function convert_caption($content) 
{ 
    return preg_replace(
        '/\[caption([^\]]+)align="([^"]+)"\s+width="(\d+)"\](\s*\<img[^>]+>)\s*(.*?)\s*\[\/caption\]/i', 
        '<div\1style="width: \3px" class="wp-caption \2">\4<p class="caption">\5</p></div>', 
        $content); 
}