JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css">
<form accept-charset="UTF-8" action="/task_categories/1" class="form-horizontal" id="edit_task_category_1" method="post"> 
  <div class="row">
    <div class="col-md-4">
      <div class="well">        
        <div class="form-group"><label class="control-label col-sm-6" for="task_category_task_category_users_attributes_0_Enable">Enable?</label><div class="col-sm-6"><input name="task_category[task_category_users_attributes][0][enable]" type="hidden" value="0"><input class="form-control" id="task_category_task_category_users_attributes_0_enable" name="task_category[task_category_users_attributes][0][enable]" type="checkbox" value="true"></div></div>
        <div class="form-group"><label class="control-label col-sm-6" for="task_category_task_category_users_attributes_0_Enable Comment">Enable comment?</label><div class="col-sm-6"><input name="task_category[task_category_users_attributes][0][comments_enabled]" type="hidden" value="0"><input class="form-control" id="task_category_task_category_users_attributes_0_comments_enabled" name="task_category[task_category_users_attributes][0][comments_enabled]" type="checkbox" value="true"></div></div>
        <input id="task_category_task_category_users_attributes_0_user_id" name="task_category[task_category_users_attributes][0][user_id]" type="hidden" value="1">
      </div>
    </div>

    <div class="col-md-4">
      <div class="well">
        <div class="form-group"><label class="control-label col-sm-6" for="task_category_task_category_users_attributes_1_Enable">Enable?</label><div class="col-sm-6"><input name="task_category[task_category_users_attributes][1][enable]" type="hidden" value="0"><input class="form-control" id="task_category_task_category_users_attributes_1_enable" name="task_category[task_category_users_attributes][1][enable]" type="checkbox" value="true"></div></div>
        <div class="form-group"><label...

CSS

.form-horizontal .control-label{
    text-align: left;
}