New display form wrong view Attendees filed (show html code)

Hi guys ,

i have created a new display form for the calendar list with SP designer . The problem is that the Attendess filed is showed :

<span class="ms-noWrap"><span class='ms-spimn-presenceLink'><span class='ms-spimn-presenceWrapper ms-imnImg ms-spimn-imgSize-10x10'><img class='ms-spimn-img ms-spimn-presence-disconnected-10x10x32' src='/_layouts/15/images/spimn.png?rev=23' alt='' /></span></span><span class="ms-noWrap ms-imnSpan"><span class='ms-spimn-presenceLink'><img class='ms-hide' src='/_layouts/15/images/blank.gif?rev=23' alt='' /></span><a class="ms-subtleLink" onclick="GoToLinkOrDialogNewWindow(this);return false;" href="/sites/ProjectSolution/Android%20App/_layouts/15/userdisp.aspx?ID=1">Administrator</a></span></span>

and i want to see only the Text : Administrator.

Why?