Widget showing on page, but not in controlpanel

Hello.

I have this problem, that a text is showing in right widget panel on the public webpage, but i cant see backend in controlpanel.

This is the html code from the public page with the text, that i would like to find and delete shows – somehow it also does not look like the other widgets with different classes, but it shows above the other widgets and i dont know where to edit it in control panel:

<div class="inner_sidebar extralight-border"><nav class="widget widget_nav_menu widget_nav_hide_child"><ul class="nested_nav"><li class="page_item page-item-902"><a href="http://frieskolersledere.dk/kursusoversigt/frie-skolers-lederes-lederkonference-2016/">

Reservér din plads på LederKonferencen 2016 allerede nu! [THIS IS THE TEXT I SEE ON THE WEBPAGE]

</a></li>
</ul></nav><section id="widget_sp_image-3" class="widget clearfix widget_sp_image"><h3 class="widgettitle">Tilmeld dig (og en kollega) Frie Skolers Ledere Symposium!</h3><a href="http://frieskolersledere.dk/kursusoversigt-3/" target="_self" class="widget_sp_image-image-link" title="Tilmeld dig (og en kollega) Frie Skolers Ledere Symposium!" rel="" style="position: relative; overflow: hidden;"><img width="460" height="250" alt="Tilmeld dig (og en kollega) Frie Skolers Ledere Symposium!" class="attachment-full" style="max-width: 100%;" src="http://frieskolersledere.dk/wp-content/uploads/2016/07/1.png"><span class="image-overlay overlay-type-extern" style="display: none;"><span class="image-overlay-inside"></span></span></a><span class="seperator extralight-border"></span></section><section id="text-3" class="widget clearfix widget_text">			<div class="textwidget"><div class="hr"></div></div>

Any help appreciated.

Kindly Jesper