How to modify the HTML generated by Rails form helper

Question

I want to get this structure:

<label for="form-field-1" class="col-sm-3 control-label no-padding-right">Text Field</label>
<div class="col-sm-9">
  <div class="input string optional url_command_model_name"><input type="text" name="url_command[model_name]" id="url_command_model_name" class="string optional"></div>
</div>

But when I use = f.input :model_name, I get this HTML:

<div class="input string optional url_command_model_name">
  <label for="url_command_model_name" class="string optional control-label">Model name</label>
  <input type="text" name="url_command[model_name]" id="url_command_model_name" class="string optional">
</div>