tinymce.json

{
    "valid_elements" : "h1,h2,h3,a[href|target|class],strong/b,em,u,s,p[class],span[!class],br,img[alt|class|width|height|!src],table[class],ul,li,ol,table[class],tr,td[rowspan|colspan],th,tbody,thead",
    "valid_children" : "p[span|img|strong|em|u|s|b|a|#text],ul[li],ol[li],li[span|strong|b|a|em|u|#text|ul|ol]",
    "formats": {
        "alignleft": { 
            "selector": "p,h1,h2,h3,h4,h5,h6,td,th,div,ul,ol,li,table", 
            "classes": "text-left"
        },
        "aligncenter": { 
            "selector": "p,h1,h2,h3,h4,h5,h6,td,th,div,ul,ol,li,table",
            "classes": "text-center" 
        },
        "alignright": { 
            "selector": "p,h1,h2,h3,h4,h5,h6,td,th,div,ul,ol,li,table", 
            "classes": "text-right" 
        },
        "italic": {
            "inline" : "em"
        },
        "underline": {
            "inline" : "u"
        },
        "strikethrough": {
            "inline" : "s"
        }
    }
}