Called after tag conversion of HTML to bbcode (e.g. remote message posting)
`$b` is a string converted text
+### head
+Called when building the `<head>` sections.
+Stylesheets should be registered using this hook.
+`$b` is an HTML string of the `<head>` tag.
+
### page_header
Called after building the page navigation section.
`$b` is a string HTML of nav region.
### footer
Called after HTML content functions have completed.
+Deferred Javascript files should be registered using this hook.
`$b` is (string) HTML of footer div/element.
-Used to load deferred Javascript files.
### avatar_lookup
Called when looking up the avatar. `$b` is an array:
### src/App.php
Addon::callHooks('load_config');
+ Addon::callHooks('head');
Addon::callHooks('footer');
### src/Model/Item.php