有一个线索wp-includes/formatting.php 在函数中wptexturize:

$default_no_texturize_shortcodes = array(\'code\');
...
$no_texturize_shortcodes = \'(\' . implode(\'|\',
    apply_filters(\'no_texturize_shortcodes\', $default_no_texturize_shortcodes) ) . \')\';

function my_no_tex( $shortcodes ) {
    $shortcodes[] = \'someshortcode\';
    return $shortcodes;
}
add_filter( \'no_texturize_shortcodes\', \'my_no_tex\' );