Creating an horizontal

You can create Bootstrap horizontal forms quite easily:

echo $this->Form->create(null, ['horizontal' => true]);
echo $this->Form->input('username', ['type' => 'text']) ;
echo $this->Form->input('password', ['type' => 'password']) ;
echo $this->Form->input('remember', ['type' => 'checkbox']) ;
echo $this->Form->submit('Log In') ;
echo $this->Form->end() ;

<form method="post" accept-charset="utf-8" class="form-horizontal" role="form" action="#">
    <div style="display:none;">
        <input type="hidden" name="_method" class="form-control "  value="POST" />
    </div>
    <div class="form-group text">
        <label class="col-md-2 control-label"  for="username">Username</label>
        <div class="col-md-6">
            <input type="text" name="username" class="form-control "  id="username" />
        </div>
    </div>
    <div class="form-group password">
        <label class="col-md-2 control-label"  for="password">Password</label>
        <div class="col-md-6">
            <input type="password" name="password" class="form-control "  id="password" />
        </div>
    </div>
    <div class="form-group">
        <div class="col-md-offset-2 col-md-6">
            <div class="checkbox">
                <input type="hidden" name="remember" class="form-control "  value="0" />
                <label for="remember">
                    <input type="checkbox" name="remember" value="1" id="remember">
                    Remember
                </label>
            </div>
        </div>
    </div>
    <div class="form-group">
        <div class="col-md-offset-2 col-md-6">
            <input type="submit" class="btn btn-default" value="Log In">
        </div>
    </div>
</form>

Specifying the width of the columns

You can change the widths of the columns at any time and specify different widths for different display sizes using setConfig:

$this->Form->setConfig('columns', [
    'sm' => [
        'label' => 4,
        'input' => 4,
        'error' => 4
    ],
    'md' => [
        'label' => 2,
        'input' => 6,
        'error' => 4
    ]
]);
echo $this->Form->create(null, ['horizontal' => true]);
echo $this->Form->input('username', ['type' => 'text']) ;
echo $this->Form->input('password', ['type' => 'password']) ;
echo $this->Form->input('remember', ['type' => 'checkbox']) ;
echo $this->Form->submit('Log In') ;
echo $this->Form->end() ;

<form method="post" accept-charset="utf-8" class="form-horizontal" role="form" action="#">
    <div style="display:none;">
        <input type="hidden" name="_method" class="form-control "  value="POST" />
    </div>
    <div class="form-group text">
        <label class="col-sm-4 col-md-2 control-label"  for="username">Username</label>
        <div class="col-sm-4 col-md-6">
            <input type="text" name="username" class="form-control "  id="username" />
        </div>
    </div>
    <div class="form-group password">
        <label class="col-sm-4 col-md-2 control-label"  for="password">Password</label>
        <div class="col-sm-4 col-md-6">
            <input type="password" name="password" class="form-control "  id="password" />
        </div>
    </div>
    <div class="form-group">
        <div class="col-sm-offset-4 col-md-offset-2 col-sm-4 col-md-6">
            <div class="checkbox">
                <input type="hidden" name="remember" class="form-control "  value="0" />
                <label for="remember">
                    <input type="checkbox" name="remember" value="1" id="remember">
                    Remember
                </label>
            </div>
        </div>
    </div>
    <div class="form-group">
        <div class="col-sm-offset-4 col-md-offset-2 col-sm-4 col-md-6">
            <input type="submit" class="btn btn-default" value="Log In">
        </div>
    </div>
</form>

You can set the default column widths when configuring the helper:

public $helpers = [
    'Form' => [
        'className' => 'Bootstrap.Form',
        'columns' => [
            'sm' => [
                'label' => 4,
                'input' => 4,
                'error' => 4
            ],
            'md' => [
                'label' => 2,
                'input' => 6,
                'error' => 4
            ]
        ]
    ]
];

Non horizontal input inside horizontal form

It is possible to create a non-horizontal input inside an horizontal form, for instance to avoid compatibility issue for various plugins. To do so, simply set the horizontal attribute to false before the input, and reset it to true after:

<?php
    echo $this->Form->create(NULL, ['horizontal' => true]) ;
    echo $this->Form->input('horizontal_1');
    echo $this->Form->horizontal = false;
    echo $this->Form->input('non_horizontal');
    echo $this->Form->horizontal = true;
    echo $this->Form->input('horizontal_2');
    echo $this->Form->end() ;
?>



<form accept-charset="utf-8" action="#" class="form-horizontal" method="post">
    <div style="display:none;">
        <input class="form-control" name="_method" type="hidden" value="POST">
    </div>
    <div class="form-group text">
        <label class="col-md-2 control-label" for="horizontal-1">Horizontal 1</label>
        <div class="col-md-6">
            <input class="form-control" id="horizontal-1" name="horizontal_1" type="text">
        </div>
    </div>
    <div class="form-group text">
        <label class=" control-label" for="non-horizontal">Non Horizontal</label>
        <input class="form-control" id="non-horizontal" name="non_horizontal" type="text">
    </div>
    <div class="form-group text">
        <label class="col-md-2 control-label" for="horizontal-2">Horizontal 2</label>
        <div class="col-md-6">
            <input class="form-control" id="horizontal-2" name="horizontal_2" type="text">
        </div>
    </div>
</form>