Hello, thanks for the reply. On my side I did some tests and I found a solution that seems to work.

in the file mod/thewire/start.php

I modified the function function thewire_filter ($ text)

I disabled the $ text = preg_replace for the links and added as a function: return trim (html_entity_decode ($ text));

The Wire now displays the html perfectly.

You can change only start.php instead of 2 files or more.

Just add this in thewire_save_post() function:

$text = strip_tags($text);

Or even:

$text = urldecode(html_entity_decode(strip_tags($text)));

Before

$post->description = htmlspecialchars($text, ENT_NOQUOTES | ENT_SUBSTITUTE, 'UTF-8');

Keep in your minds, all your hacks will be lost after updating Elgg in next release.

So, best way is a creating your custom plugin.

@Vangardis please keep in mind http://learn.elgg.org/en/stable/guides/dont-modify-core.html

If you modify files directly in Elgg core those modification will be lost when you update. You can make a plugin with the modifications you need that way your hard work won't be lost on an update.

For example you could overrule the add form view http://learn.elgg.org/en/stable/guides/views.html#overriding-views

PS: mostly if there is an 'input/longtext' you want to output using 'output/longtext' this makes sure you don't see the HTML code. In your case have a look at https://github.com/Elgg/Elgg/blob/01f00125e6b4fa068b38cda61980405360df539b/mod/thewire/views/default/object/thewire.php#L30 and modify it to (in an overruled view):

$params['body'] = elgg_view('output/longtext', ['value' => $entity->description]);