Is there a way to manipulate the resulting HTML that jForm generates?
$this->form->renderField('myfield');
Apparent Joomla Default Form HTML
<div class="control-group">
<div class="control-label">
<label id="jform_myfield-lbl" for="jform_myfield" data-placement="bottom">My Field</label>
</div>
<div class="controls">
<input name="jform[myfield]" id="jform_myfield" value="My Value" class="input-sm" placeholder="Enter a value" aria-invalid="false" type="text">
</div>
</div>
Preferred HTML
<div class="form-group">
<label for="myfield" class="col-sm-2 control-label">My Field</label>
<div class="col-sm-10">
<input class="form-control valid" id="myfield" name="myfield" value="My Value" placeholder="Enter a value" required="" type="text">
</div>
</div>