Remove rel="attachment wp-att-XX"

Question

When you add an image with "Add media" to the WYSIWYG editor the link around the image automatically gets a rel="attachment wp-att-XX". I would like to remove this with a script - Can anyone help me? :)

Answer 1

You can remove it right before post is printed to the screen by stripping it out from content. But remember it still will meddle in Editor.

<?php
function my_remove_rel_attr($content) {
    return preg_replace('/\s+rel="attachment wp-att-[0-9]+"/i', '', $content);
}
add_filter('the_content', 'my_remove_rel_attr');

Answer 2

I guess you mean instead of this html:

<a href="http://example.com/?attachment_id=1375" rel="attachment wp-att-1375"><img src="http://example.com/wp-content/uploads/2012/09/image-300x78.jpg" alt="image.jpg" width="300" height="78" class="alignnone size-medium wp-image-1375" /></a>

you want:

<a href="http://example.com/?attachment_id=1375" ><img src="http://example.com/wp-content/uploads/2012/09/image-300x78.jpg" alt="image.jpg" width="300" height="78" class="alignnone size-medium wp-image-1375" /></a>

in your editor when you press "Insert into post".

Then you can try to use the filter image_send_to_editor and replace the rel-part of the html that is inserted into the editor:

add_filter('image_send_to_editor', 'wpse_88984_remove_rel', 10, 2);
function wpse_88984_remove_rel($html, $id) {
    if($id>0)
        $html=str_replace('rel="attachment wp-att-'.$id.'"','',$html);

    return $html;   
}