^^&&^^

Edit File: render.php

<?php

namespace MetForm\Utils;

/**
 * Render html components
 */
class Render
{

public static $content_data;

public static function tab($id, $lable, $caption)
    {
        ?>
        <li>
            <a href="#<?php echo esc_html($id); ?>" class="mf-setting-nav-link">
                <div class="mf-setting-tab-content">
                    <span class="mf-setting-title"><?php echo esc_html__($lable, 'metform'); ?></span>
                    <span class="mf-setting-subtitle"><?php echo esc_html__($caption, 'metform'); ?></span>
                </div>
            </a>
        </li>

<?php
    }

public static function tab_content($id, $title)
    {

<?php do_action('metform_settings_subtab_' . $id); ?>

</ul>
                    </div>

</div>

<?php do_action('metform_settings_subtab_content_' . $id); ?>

</div>

</div>
        </div>
        <?php
    }

public static function sub_tab($title, $target_id, $is_active = null)
    {
        ?>

<?php
    }

public static function sub_tab_content($sub_tab_id, $content, $active = '')
    {
        ?>

<div class="attr-tab-pane attr-fade <?php if ($active == 'active'): ?> attr-active attr-in  <?php endif; ?>"
             id="<?php echo esc_html($sub_tab_id); ?>" role="tabpanel" aria-labelledby="nav-profile-tab">
            <div class="attr-row">
                <div class="attr-col-lg-6">

<?php call_user_func($content); ?>

</div>
            </div>

</div>

<?php
    }

public static function button($data){
        $class = isset($data['class']) ? $data['class'] : 'mf-admin-setting-btn';
        $id    = isset($data['id']) ? $data['id'] : '';
        $text  = isset($data['text']) ? $data['text'] : '';
    ?>
    <div class="mf-setting-input-group">
        <button type="button" id="<?php echo esc_html($id,'metform') ?>" class="<?php echo esc_html($class,'metform') ?>"><?php echo esc_html($text,'metform') ?></button>
    </div>
    <?php 
    }

public static function textbox($data)
    {
        $settings = \MetForm\Core\Admin\Base::instance()->get_settings_option();

<div class="mf-setting-input-group">
            <label for="attr-input-label"
                   class="mf-setting-label mf-setting-label attr-input-label"><?php esc_html_e($data['lable'], 'metform'); ?></label>
            <input type="text" name="<?php echo esc_attr($data['name']); ?>"
                   value="<?php echo esc_attr((isset($settings[$data['name']])) ? $settings[$data['name']] : ''); ?>"
                   class="mf-setting-input mf-mailchimp-api-key attr-form-control"
                   placeholder="<?php esc_html_e($data['placeholder'], 'metform'); ?>">
            <p class="description">
                <?php esc_html_e($data['description'], 'metform'); ?>
            </p>
        </div>

<?php
    }

public static function checkbox($data)
    {

<div class="mf-input-group">
            <label class="attr-input-label">
                <input type="checkbox"
                       value="1"
                       name="<?php echo esc_html_e($data['name'], 'metform'); ?>"
                       class="mf-admin-control-input <?php echo esc_html_e($data['class'], 'metform'); ?>">

</label>
            <?php if (isset($data['details'])): ?>
                <span
                        class='mf-input-help'>
                    <?php esc_html_e($data['details'], 'metform'); ?>
                    
            </span>
            <?php endif; ?>

</div>

<?php
    }

public static function form_tab($id, $lable)
    {
        ?>

<li role="presentation">
            <a href="#<?php echo esc_attr($id); ?>" aria-controls="crm" role="tab" data-toggle="tab">
                <?php esc_html_e($lable, 'metform'); ?>
            </a>
        </li>

<?php
    }

public static function form_tab_content($parent_id)
    {

<?php do_action('mf_push_tab_content_' . $parent_id); ?>

</div>

<?php
    }

public static function div($id = '', $class = '', $content = '')
    {
        ?>

<div id="<?php echo esc_html($id); ?>" class="<?php echo esc_html($class); ?>">

<?php \MetForm\Utils\Util::metform_content_renderer($content); ?>

</div>

<?php
    }

public static function seperator()
    {
        ?>

<?php
    }

}