Play2.0でBootstrap2.0

bootstrap1.html

<div class="clearfix error" id="username_field">
    <label for="username">Username:</label>
    <div class="input">
        <input type="text" name="username" id="username" value="">
        <span class="help-inline">This field is required!, Another error</span>
        <span class="help-block">Required, Another constraint</span>
    </div>
</div>

bootstrap2.html

<div class="control-group error" id="username_field">
    <label class="control-label" for="username">Username</label>
    <div class="controls">
        <input type="text" id="username" name="username" value="">
        <p class="help-inline">This field is required!, Another error</p>
        <p class="help-block">Required, Another constraint</p>
    </div>
</div>

bootstrapField.scala.html

@(elements: views.html.helper.FieldElements)

@import play.api.i18n._
@import views.html.helper._

<div class="control-group @elements.args.get('_class) @if(elements.hasErrors) {error}" id="@elements.args.get('_id).getOrElse(elements.id + "_field")">
    <label class="control-label" for="@elements.id">@elements.label(elements.lang)</label>
    <div class="controls">
        @elements.input
        @if(elements.errors.length > 0) {<span class="help-inline">@elements.errors(elements.lang).mkString(", ")</span>}
        @if(elements.infos.length > 0) {<p class="help-block">@elements.infos(elements.lang).mkString(", ")</p>}
    </div>
</div>

BootstrapHelper.scala

package views

import views.html.bootstrapField
import views.html.helper.FieldConstructor

object BootstrapHelper {
  implicit val bootstrapConstructor = FieldConstructor(bootstrapField.f)
}

borderedBootstrapField.scala.html

@(elements: views.html.helper.FieldElements)

@import play.api.i18n._
@import views.html.helper._

<div class="control-group @elements.args.get('_class) @if(elements.hasErrors) {error}" style="border-style: dashed;" id="@elements.args.get('_id).getOrElse(elements.id + "_field")">
    <label class="control-label" for="@elements.id">@elements.label(elements.lang)</label>
    <div class="controls">
        @elements.input
        @if(elements.errors.length > 0) {<span class="help-inline">@elements.errors(elements.lang).mkString(", ")</span>}
        @if(elements.infos.length > 0) {<p class="help-block">@elements.infos(elements.lang).mkString(", ")</p>}
    </div>
</div>

nobootstrap.html

<dl class="error" id="username_field">
    <dt><label for="username"><label>Username:</label></dt>
    <dd><input type="text" name="username" id="username" value=""></dd>
    <dd class="error">This field is required!</dd>
    <dd class="error">Another error</dd>
    <dd class="info">Required</dd>
    <dd class="info">Another constraint</dd>
</dl>

blog用のコードを置いてます。
http://d.hatena.ne.jp/shinobu_aoki/20120302/1330716992