Flip horizontally html and css

I tried this, and it works great!

HTML code:

<div class="flip-container" ontouchstart="this.classList.toggle('hover');">
    <div class="flipper">
        <div class="front">
            <!-- Front content -->
        </div>

        <div class="back">
            <!-- Back content -->
        </div>
    </div>
</div>

The CSS:

/* Flip the pane when hovered */
.flip-container:hover .flipper, .flip-container.hover .flipper {
    transform: rotateY(180deg);
}

.flip-container, .front, .back {
    width: 320px;
    height: 480px;
}

/* Flip speed goes here */
.flipper {
    transition: 0.6s;
    transform-style: preserve-3d;

    position: relative;
}

/* Hide back of pane during swap */
.front, .back {
    backface-visibility: hidden;

    position: absolute;
    top: 0;
    left: 0;
}

/* Front pane, placed above back */
.front {
    z-index: 2;

    /* For Firefox 31 */
    transform: rotateY(0deg);
}

/* Back, initially hidden pane */
.back {
    transform: rotateY(180deg);
}

I use this inside a Bootstrap col-sm-* and works great too:

<div class="col-sm-4 flip-container" ontouchstart="this.classList.toggle('hover');">
    <div class="content-box flipper">
        <div class="content-box-front">
            <span class="glyphicon glyphicon-envelope content-box-icon"></span>
            <h4>Share your emotions</h4>
        </div>
        <div class="content-box-back">
            <p>Share emotions with friends, family and teammates.</p>
            <button>Read more</button>
        </div>
    </div>
</div>

the CSS:

.content-box {
    position: relative;
    text-align: center;
    height: 105px;
    width: 100%;
}

.content-box-icon {
    font-size: 30px;
    width: 60px;
    height: 60px;
    line-height: 60px;
    border-radius: 50%;
    text-align: center;
    display: block;
    margin: 5px auto 15px auto;
    color: #fff;
    float: none; 
    background:#25acfd                     
}

.content-box-front
{
    z-index: 2;

    /* For Firefox 31 */
    transform: rotateY(0deg);

    backface-visibility: hidden;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 105px;
}

.content-box-back {
    transform: rotateY(180deg);
    backface-visibility: hidden;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 105px;
}

/* Entire container, keeps perspective */

/* Flip the pane when hovered */
.flip-container:hover .flipper, .flip-container.hover .flipper {
    transform: rotateY(180deg);
}

/* Flip speed goes here */
.flipper {
    transition: 0.6s;
    transform-style: preserve-3d;
    position: relative;
}

Your fiddle already had the start of the answer - to do a second flip on the text. There was an extra , preventing the second rule from being parsed.

I've updated the fiddle to include the heading elements, and set them to inline-block because inline elements can't be transformed.

.flip-horizontal, .x-grid-cell-inner, .x-column-header-text, .x-panel-header-text {
    -moz-transform: scaleX(-1);
    -webkit-transform: scaleX(-1);
    -o-transform: scaleX(-1);
    transform: scaleX(-1);
    -ms-filter: fliph; /*IE*/
    filter: fliph; /*IE*/
}

.x-column-header-text, .x-panel-header-text {
    display: inline-block;
}