hook_menu title callback on wildcard
You need to provide the wildcard as title arguments:

$items['test/%'] = array(
  'title' =&gt; t('Test title'),
  'title callback' =&gt; 'function_title_callback',
  'title arguments' =&gt; array(1),
  'type' =&gt; MENU_NORMAL_ITEM,
  'access arguments' =&gt; array('access content'),
  'page callback' =&gt; 'function_content_callback',
);


And obviously make sure that your function is actually called function_title_callback() (which you've listed in hook_menu()), and not cjgimport_title_callback(), which you have listed in the question.

You should also be using the $arg variable, not the arg() function in your callback...but I guess that might be the result of debugging.