<div class="input-wrap">
                <div class="clearfix" id="UserLogin-gender">
                    <label class="radio-head">Gender</label>
                    <?=
                    $form->field($model, 'gender')
                        ->radioList(
                            [1 => 'Male', 0 => 'Female'],
                            [
                                'item' => function($index, $label, $name, $checked, $value) {

                                    $return = '<label class="modal-radio">';
                                    $return .= '<input type="radio" name="' . $name . '" value="' . $value . '" tabindex="3">';
                                    $return .= '<i></i>';
                                    $return .= '<span>' . $label . '</span>';
                                    $return .= '</label>';

                                    return $return;
                                }
                            ]
                        )
                    ->label(false);
                    ?>
                </div>
                <div class="help-block"></div>
            </div>