<%= link_to "Accept", accept_candidate_path(vacancy_id: @vacancy.id, employee_id: e.id), method: :post, :remote => true, :id => "link_#{i}" %>

<%= link_to "Cancel", back_to_pending_path(vacancy_id: @vacancy.id, employee_id: e.id), method: :post, :remote => true%>

$("[id^='link_']").click(function (event) {
  $(this).replaceWith("Accepted")
});

# back_to_pending.js
$("[id^='link_']").html("<%= escape_javascript(render('cancel_link')) %>")


# cancel_link.html.erb
<%= link_to "Cancel", back_to_pending_path(vacancy_id: @vacancy.id, employee_id: e.id), method: :post, :remote => true%>