bp_activity_admin_get_activity_actions()

function bp_activity_admin_get_activity_actions() {
	$actions  = array();

	// Walk through the registered actions, and build an array of actions/values.
	foreach ( bp_activity_get_actions() as $action ) {
		$action = array_values( (array) $action );

		for ( $i = 0, $i_count = count( $action ); $i < $i_count; $i++ ) {
			$actions[ $action[$i]['key'] ] = $action[$i]['value'];
		}
	}

	// This was a mis-named activity type from before BP 1.6.
	unset( $actions['friends_register_activity_action'] );

	// Sort array by the human-readable value.
	natsort( $actions );

	return $actions;
}