首先在footer.php找到：
<a href="<?php echo esc_url( __( 'https://wordpress.org/', 'twentytwelve' ) ); ?>" class="imprint" title="<?php esc_attr_e( 'Semantic Personal Publishing Platform', 'twentytwelve' ); ?>"> <?php printf( __( 'Proudly powered by %s', 'twentytwelve' ), 'WordPress' ); ?> </a>
然后改成：
<a href="<?php echo esc_url( home_url( '/' ) ); ?>" title="<?php echo esc_attr( get_bloginfo( 'name', 'display' ) ); ?>" rel="home"><?php bloginfo( 'name' ); ?></a>
