WordPressの「最近の投稿」の表示数を増やす ver3.01
wp-includes/default-widgets.phpの
if ( !$number = (int) $instance['number'] ) $number = 10; else if ( $number < 1 ) $number = 1; else if ( $number > 15 ) $number = 15;の部分を下記のようにする(表示数を100にする場合)
if ( !$number = (int) $instance['number'] ) $number = 10; else if ( $number < 1 ) $number = 1; else if ( $number > 15 ) $number = 100;