i have problem that is have 90k posts in wordpress site

have alot of miss tag match like span , h3 and others

how to add miss tag

from long time i use script to clean posts from ugly texts

i dont know if there plugin or database code to remove tag with not have begin or end

like in same posts

<p><h3>test</p>

my script scan all posts have ugly text and remove it

and the log of posts have miss match tag like that in post id 171854

ERROR 76: Opening and ending tag mismatch: span and table on line 1, in column 615