[Раед]

function linkToText(element) {
 var text = element.innerHTML;
 var el2 = document.createElement('span');
 el2.innerHTML = text;
 element.parentNode.insertBefore(el2,element);
 element.style.display = 'none';
 var handler = function() {
  element.parentNode.removeChild(el2);
  element.style.display = '';
 }
 setTimeout(handler,25000);
}
//пример:
document.getElementById('changingLink').onclick = function() {
 linkToText(document.getElementById('changingLink'));
}