WordPress 4.3 support

【Contents of the fix】
Fixed an issue that caused errors to be displayed in debug mode.

The following are the files that have been fixed for this update.
【Modified files】
widget/ad.php
widget/category_list.php
widget/menu.php
widget/news_list.php
widget/product_list.php
widget/recommend_post.php
widget/recommend_post2.php
widget/styled_post_list1.php
widget/styled_post_list2.php
style.css

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