function replace_text_wps($text){
$replace = array(
// '替换前的内容' => '替换后的内容'
'wordpress' => '<a href="#">wordpress</a>',
'excerpt' => '<a href="#">excerpt</a>',
'function' => '<a href="#">function</a>'
);
$text = str_replace(array_keys($replace),$replace,$text);
return $text;
}

add_filter('the_content','replace_text_wps');
add_filter('the_content','replace_text_wps');