Text formatting in the custom fields

How can I format text in the custom fields? I have to mark appropriate places with me for example with < strong >.

That worked until some time ago. Now the command is displayed in plain text.

For example these post: https://salzsau-panorama.de/2017/11/26/wahre-musik-kenner-und-liebhaber/ under ‘Ergänzende Informationen’

Hello Catalin,

Here is a Screenshot, which i mean.

And that’s the code I used to create the custom field
<div class="td-meta-box-row">
<?php $mb->the_field('td_infos'); ?>
<span class="td-page-o-custom-label">Ergänzende Informationen:</span>
<textarea name="<?php $mb->the_name(); ?>" class="td-textarea-subtitle"><?php $mb->the_value(); ?></textarea>
<span class="td-page-o-info">Ergänzende Informationen</span>
</div>

And hereby I give out the content of the field in the blog post

<?php if (!empty($td_mod_single->td_post_theme_settings['td_infos'])) { ?>
<span class="info_title">Ergänzende Informationen</span><br />
<div class="info_inhalt"><?php echo nl2br ( esc_html ( $td_mod_single->td_post_theme_settings['td_infos']));?></div>
<?php } ?>

It seems to work!

Thanks Simion