WIDGETS:
Array
(
    [0] => WP_Widget_Pages
    [1] => WP_Widget_Calendar
    [2] => WP_Widget_Archives
    [3] => WP_Widget_Media_Audio
    [4] => WP_Widget_Media_Image
    [5] => WP_Widget_Media_Gallery
    [6] => WP_Widget_Media_Video
    [7] => WP_Widget_Meta
    [8] => WP_Widget_Search
    [9] => WP_Widget_Text
    [10] => WP_Widget_Categories
    [11] => WP_Widget_Recent_Posts
    [12] => WP_Widget_Recent_Comments
    [13] => WP_Widget_RSS
    [14] => WP_Widget_Tag_Cloud
    [15] => WP_Nav_Menu_Widget
    [16] => WP_Widget_Custom_HTML
    [17] => Akismet_Widget
    [18] => Ai1ec_View_Admin_Widget
    [19] => UMC_Content
    [20] => Conference_Content
    [21] => Upper_Room
)