From an other module can not find function taxonomy_form_all after a taxonomy wrapper has been installed.
I just copy-paste that function from original taxonomy module.

/**
* Generate a set of options for selecting a term from all vocabularies.
*/
function taxonomy_form_all($free_tags = 0) {
$vocabularies = taxonomy_get_vocabularies();
$options = array();
foreach ($vocabularies as $vid => $vocabulary) {
if ($vocabulary->tags && !$free_tags) { continue; }
$tree = taxonomy_get_tree($vid);
if ($tree && (count($tree) > 0)) {
$options[$vocabulary->name] = array();
foreach ($tree as $term) {
$options[$vocabulary->name][$term->tid] = str_repeat('-', $term->depth) . $term->name;
}
}
}
return $options;
}