PHP - Guardar texto con formato en bbdd

<!--- TinyMCE --->

<script type="text/javascript" src="../../editor/tiny_mce/tiny_mce.js"></script>

<script type="text/javascript">

    // O2k7 skin (silver)

    tinyMCE.init({

        // General options

        mode : "exact",

        elements : "contenido_tema_1",

        theme : "advanced",

        skin : "o2k7",

        skin_variant : "black",

        plugins : "pagebreak,style,layer,table,save,advhr,advimage,advlink,emotions,iespell,insertdatetime,preview,media,searchreplace,print,contextmenu,paste,directionality,fullscreen,noneditable,visualchars,nonbreaking,xhtmlxtras,template,inlinepopups,autosave",

        // Theme options

        theme_advanced_buttons1 : "save,newdocument,|,bold,italic,underline,strikethrough,|,justifyleft,justifycenter,justifyright,justifyfull,styleselect,formatselect,fontselect,fontsizeselect",

        theme_advanced_buttons2 : "cut,copy,paste,pastetext,pasteword,|,search,replace,|,bullist,numlist,|,outdent,indent,blockquote,|,undo,redo,|,link,unlink,anchor,image,cleanup,help,code,|,insertdate,inserttime,preview,|,forecolor,backcolor",

        theme_advanced_buttons3 : "tablecontrols,|,hr,removeformat,visualaid,|,sub,sup,|,charmap,emotions,iespell,media,advhr,|,print,|,ltr,rtl,|,fullscreen",

        theme_advanced_buttons4 : "insertlayer,moveforward,movebackward,absolute,|,styleprops,|,cite,abbr,acronym,del,ins,attribs,|,visualchars,nonbreaking,template,pagebreak,restoredraft",

        theme_advanced_toolbar_location : "top",

        theme_advanced_toolbar_align : "left",

        theme_advanced_statusbar_location : "bottom",

        theme_advanced_resizing : true,

        // Example content CSS (should be your site CSS)

        content_css : "css/content.css",

        // Drop lists for link/image/media/template dialogs

        template_external_list_url : "lists/template_list.js",

        external_link_list_url : "lists/link_list.js",

        external_image_list_url : "lists/image_list.js",

        media_external_list_url : "lists/media_list.js",

        // Replace values for the template plugin

        template_replace_values : {

            username : "Some User",

            staffid : "991234"

        }

    });

</script>

<!--- Fin TinyMCE --->

<textarea name="contenido_tema_1" placeholder="Insertar o modificar contenido Tema 1" value="" id="contenido_tema_1" class="textarea_style_tema_n" title="Contenido tema 1"></textarea>