I need to add a custom toolbar (cf. image below) to this Metaboxes
Do you want to add a custom TinyMCE toolbar to the TinyMCE/visual editor, or do you want to turn a textarea
into a TinyMCE editor?
If it is the latter one, here’s a sample code for turning the champ_home textarea
into a TinyMCE editor:
wp_editor( $val, 'champ_home', array(
'textarea_name' => 'champ_home',
'textarea_rows' => '10',
// TRUE to output the minimal editor config, such as the Comment editor.
'teeny' => true,
) );
See: