Distinct array object values

Array Object removes repeated values Array (& nbsp; [4968] & nbsp; & gt; & nbsp; WP_Post & nbsp; Object & nbsp; & nbsp; (& nbsp; & nbsp; & nbs array object removes repeated values

Array
(
[4968] => WP_Post Object
(
[ID] = & gt; 4968
[Post_author] => 1
[Post_date] => 14:32:54
[Post_date_gmt] => 06:32:54
[Post_content] =>
[Post_title] => taibei
[Post_excerpt] => date of coming to Taipei
[Post_status] => inherit
[Comment_status] => open
[Ping_status] => open
[Post_password] =>
[Post_name] => taibei
[To_ping] =>
[Pinged] =>
[Post_modified] => 14:32:54
[Post_modified_gmt] => 06:32:54
[Post_content_filtered] =>
[Post_parent] = & gt; 4058
[Guid] => http://tanteng-wordpress.stor.sinaapp.com/uploads/2013/01/taibei.jpg
[Menu_order] => 0
[Post_type] => attachment
[Post_mime_type] => image/jpeg
[Comment_count] => 0
[Filter] => raw
)

[4951] => WP_Post Object
(
[ID] = & gt; 4951
[Post_author] => 1
[Post_date] => 14:38:33
[Post_date_gmt] => 06:38:33
[Post_content] =>
[Post_title] => taipei
[Post_excerpt] => life on Taipei road
[Post_status] => inherit
[Comment_status] => open
[Ping_status] => open
[Post_password] =>
[Post_name] => taipei-3
[To_ping] =>
[Pinged] =>
[Post_modified] => 14:38:33
[Post_modified_gmt] => 06:38:33
[Post_content_filtered] =>
[Post_parent] = & gt; 4058
[Guid] => http://tanteng-wordpress.stor.sinaapp.com/uploads/2013/01/taipei.jpgpsid1
[Menu_order] => 0
[Post_type] => attachment
[Post_mime_type] => image/jpeg
[Comment_count] => 0
[Filter] => raw
)

[4940] => WP_Post Object