add this in admin cp-board template-below the board

<script type="text/javascript">
(function($) {
    var regex = [/\[css\s*=([^"']+?)\]([\s\S]+?)\[\/css\]/gi, /position\s*:(?:[^;:]+?;|[^;:]+$)?/i];
    $('td.c_post').each(function() {
        var $t = $(this),
            html = $t.html(),
            change = false;

        while (regex[0].test(html)) {
            change = true;
            html = html.replace(regex[0], function(f, o, t, p) {
                return '<div style="' + o.replace(regex[1], '') + '">' + t + '</div>';
            });
        }
        if (change)
            $t.html(html);
    });
})(jQuery);
</script>