Capitalize the first letter in CSS

If your links can contain multiple words and you only want the first letter of the first word to be uppercase, use :first-letter with a different transform.

.m_title::first-letter {
    text-transform: capitalize;
}

Note that in order for :first-letter to work your a elements need to be block containers (which can be display: block, display: inline-block, or any of a variety of other combinations of one or more properties):

a.m_title {
    display: block;
}

a.m_title:first-letter {
    text-transform: uppercase;
}