replacing everything between a div in a template

[Dr.CustUmz]

i went about doing it pretty much that way lol, with a bunch of minor changes

things are not named the final name this is just my build procedure lol, i know... sloppy =)
it'll be sexy and make sence in the end
example:

//showthread_quickreply

$drcrb_hd = '</fieldset>';
$find = '<textarea name=\"message\" id=\"{$editorid}_textarea\"';
$replace = '<textarea class=\"form-control comment-form-textarea\" name=\"message\" id=\"{$editorid}_textarea\"';
$find2 = '<div class=\"controlbar\"';
$replace2 = '<div class=\"controlbar upload-enabled\"';

$vbulletin->templatecache['showthread_quickreply'] = str_replace($drcrb_hd,fetch_template('drc_iiu_below_txtarea').$drcrb_hd,$vbulletin->templatecache['showthread_quickreply']);
$vbulletin->templatecache['showthread_quickreply'] = str_replace($find,$replace,$vbulletin->templatecache['showthread_quickreply']);
$vbulletin->templatecache['showthread_quickreply'] = str_replace($find2,$replace2,$vbulletin->templatecache['showthread_quickreply']);

//newthread
$find6 = '$newpost[message]</textarea>';
$find4 = '<textarea name=\"message\" id=\"{$editorid}_textarea\"';
$replace4 = '<textarea class=\"form-control comment-form-textarea\" name=\"message\" id=\"{$editorid}_textarea\"';
$find3 = '<td class=\"controlbar\">';
$replace3 = '<td class=\"controlbar upload-enabled\">';
$vbulletin->templatecache['editor_toolbar_on'] = str_replace($find6,$find6.fetch_template('drc_iiu_below_txtarea'),$vbulletin->templatecache['editor_toolbar_on']);
$vbulletin->templatecache['editor_toolbar_on'] = str_replace($find4,$replace4,$vbulletin->templatecache['editor_toolbar_on']);
$vbulletin->templatecache['editor_toolbar_on'] = str_replace($find3,$replace3,$vbulletin->templatecache['editor_toolbar_on']);

and I could fully replace the template with my copied changes like:

$vbulletin->templatecache['editor_toolbar_on'] = $vbulletin->templatecache['drc_iiu_editor_toolbar_on'];

I just thought, "hey can I just change everything in between a div, that'd be so much easier and the user wouldn't have to worry about if my complete change is going to screw up their template."

but grabbing things that SHOULD be there no matter how custom a theme is ...SHOULD work for everyone lol