Using replaceWith in jQuery
HTML
<a data-hook="interview-reassignment-link" href="#interview/interview-reassignment">Interview Assignment Form</a>
<a data-hook="interview-deferral-request-link" href="">Interview Deferral Request Form</a>
<button id="myButton">Change my link to a span</button>
JavaScript
$('#myButton').click(function(){
$('[data-hook="interview-reassignment-link"], [data-hook="interview-deferral-request-link"]').replaceWith(function(){
return $("<span>" + $(this).html() + "</span>");
});
});