<form class="container-posts-settings">
    <!--    Section 1-->
        <div id="section-1">
            <div class="checkbox-post">
                <h3><?php _e("Section 1", 'menu-test' ); ?></h3>
                <p><?php _e("Categories:", 'menu-test' ); ?></p>
                <?php
                $cat_args=array(
                    'orderby' => 'name',
                    'order' => 'ASC'
                );
                $categories = get_categories($cat_args);
                foreach ($categories as $category) { ?>
                    <input type="checkbox" value="<?php $category->cat_name?>" name="section-1[]"><?php echo $category->cat_name?><br>
                <?php } ?>
            </div>
            <div class="image-post">
                <img src="<?php echo get_template_directory_uri() ?>/images/section-1.png">
            </div>
        </div>
        <?php submit_button(); ?>
    </form>