Fixed ads in side columns and WordPress 4.3 support

【Contents of the fix】
■Fixed the problem that an error is displayed in debug mode.
■Fixed the display of ads in the side columns.

The following are the files that have been modified for this update.

【Corrected files】
widget/ad.php
widget/ad_fixed.php
widget/author.php
widget/category_list.php
widget/styled_post_list1.php
widget/styled_post_list2.php
sidebar.php
style.css

For more information, please visit the Cubey(tcd023) download site for purchasers.