Remove p tags in wordpress posts

Question

WORDPRESS VERSION: 3.8.1 PHP version: 5.3

I have a trouble with wordpress posts. How can I remove the auto P tags added? This is my final html code:

<div class="one_half_style_4_last">
<p>
<p>
<ul class="list-green">
<p>
<h4 class="\"pattern-bg-title-grey\"">
<span>Livelli Vip</span>
</h4>
<div class="su-table table-post">
<h4 class="\"pattern-bg-title-grey\"">
<p></p>
<p>Invalid Displayed Gallery</p>
<p></p>
<h4 class="\"pattern-bg-title-grey\"">
<p></p>  
<div class="srp-widget-container">
<p></p>
<p class="omc-single-tags"></p>
<br class="clear">
<div class="omc-related-posts">
</div>

There is another trouble, wordpress add slashes (magic_quotes_gpc on my server is Off):

<h4 class="\"pattern-bg-title-grey\"">

I tried to put this code in functions.php or single.php and even comment these lines in wp-includes/default-filters.php but is not working:

remove_filter( 'the_content', 'wptexturize'        );
remove_filter( 'the_content', 'convert_smilies'    );
remove_filter( 'the_content', 'convert_chars'      );
remove_filter( 'the_content', 'wpautop'            );
remove_filter( 'the_content', 'shortcode_unautop'  );
remove_filter( 'the_content', 'prepend_attachment' );

What can i do?

Answer 1

The WordPress implementation of the TinyMCE editor automatically adds <p> tags. There's a few options for removing, as explained in a tutorial on removing <p> tags.

I would recommend the following approach, which is a slight modification from that tutorial (as it involves messing with core wp functions). Add the following code to your functions.php file which removes the auto <p>'s:

function rm_wpautop($content) {
    global $post;
    // Remove the filter
    remove_filter('the_content', 'wpautop');
    return $content;
}

// Hook into the Plugin API
add_filter('the_content', 'rm_wpautop', 9);

Alternatively, if you only wanted to remove the auto <p> tags on specific posts or pages or other parts of your theme template, look for the line <?php the_content(); ?> in your template files and add <?php remove_filter ('the_content', 'wpautop'); ?> before it.

Answer 2

Ok.... I fixed the second trouble! The problem was a option in this plugin: SEO Smart Links

I disabled this field: Prevent linking in heading tags (h1,h2,h3,h4,h5,h6)