<p>There are 2 main ways to do that:
</p><p>Number 1, go to your Wiki's
MediaWiki:Wikia.js and add this code~
</p>
<span class="kw1" style="color:rgb(0,0,102);font-weight:bold;font-family:Helvetica,Arial,sans-serif;white-space:normal;">function</span><span style="color:rgb(0,0,0);font-family:Helvetica,Arial,sans-serif;white-space:normal;"> addMastheadTags</span><span class="br0" style="color:rgb(0,153,0);font-family:Helvetica,Arial,sans-serif;white-space:normal;">(</span><span class="br0" style="color:rgb(0,153,0);font-family:Helvetica,Arial,sans-serif;white-space:normal;">)</span><span style="color:rgb(0,0,0);font-family:Helvetica,Arial,sans-serif;white-space:normal;"> </span><span class="br0" style="color:rgb(0,153,0);font-family:Helvetica,Arial,sans-serif;white-space:normal;">{</span>
<span class="kw1" style="color:rgb(0,0,102);font-weight:bold;">var</span> rights <span class="sy0" style="color:rgb(51,153,51);">=</span> <span class="br0" style="color:rgb(0,153,0);">{</span><span class="br0" style="color:rgb(0,153,0);">}</span><span class="sy0" style="color:rgb(51,153,51);">;</span>
<span class="co1" style="color:rgb(0,102,0);font-style:italic;">// BEGIN List of Accounts Given Extra User Rights Icons - Must list all tags</span>
rights<span class="br0" style="color:rgb(0,153,0);">[</span><span class="st0" style="color:rgb(51,102,204);">"JosephHawk"</span><span class="br0" style="color:rgb(0,153,0);">]</span> <span class="sy0" style="color:rgb(51,153,51);">=</span> <span class="br0" style="color:rgb(0,153,0);">[</span><span class="st0" style="color:rgb(51,102,204);">"Sysop"</span><span class="br0" style="color:rgb(0,153,0);">]</span><span class="sy0" style="color:rgb(51,153,51);">;</span>
<span class="co1" style="color:rgb(0,102,0);font-style:italic;">// END List of Accounts Given Extra User Rights Icons</span>
<span class="co1" style="color:rgb(0,102,0);font-style:italic;">// BEGIN Script to Remove Old Rights Icons & Insert New</span>
<span class="kw1" style="color:rgb(0,0,102);font-weight:bold;">if</span> <span class="br0" style="color:rgb(0,153,0);">(</span>wgCanonicalSpecialPageName <span class="sy0" style="color:rgb(51,153,51);">==</span> <span class="st0" style="color:rgb(51,102,204);">"Contributions"</span><span class="br0" style="color:rgb(0,153,0);">)</span> <span class="br0" style="color:rgb(0,153,0);">{</span>
<span class="kw1" style="color:rgb(0,0,102);font-weight:bold;">var</span> user <span class="sy0" style="color:rgb(51,153,51);">=</span> wgPageName.<span class="me1" style="color:rgb(102,0,102);">substring</span><span class="br0" style="color:rgb(0,153,0);">(</span>wgPageName.<span class="me1" style="color:rgb(102,0,102);">lastIndexOf</span><span class="br0" style="color:rgb(0,153,0);">(</span><span class="st0" style="color:rgb(51,102,204);">"/"</span><span class="br0" style="color:rgb(0,153,0);">)</span><span class="sy0" style="color:rgb(51,153,51);">+</span><span class="nu0" style="color:rgb(204,0,0);">1</span><span class="br0" style="color:rgb(0,153,0);">)</span>.<span class="me1" style="color:rgb(102,0,102);">replace</span><span class="br0" style="color:rgb(0,153,0);">(</span><span class="co2" style="color:rgb(0,153,102);font-style:italic;">/_/g</span><span class="sy0" style="color:rgb(51,153,51);">,</span><span class="st0" style="color:rgb(51,102,204);">" "</span><span class="br0" style="color:rgb(0,153,0);">)</span><span class="sy0" style="color:rgb(51,153,51);">;</span>
<span class="br0" style="color:rgb(0,153,0);">}</span> <span class="kw1" style="color:rgb(0,0,102);font-weight:bold;">else</span> <span class="br0" style="color:rgb(0,153,0);">{</span> <span class="kw1" style="color:rgb(0,0,102);font-weight:bold;">var</span> user <span class="sy0" style="color:rgb(51,153,51);">=</span> wgTitle<span class="sy0" style="color:rgb(51,153,51);">;</span> <span class="br0" style="color:rgb(0,153,0);">}</span>
<span class="kw1" style="color:rgb(0,0,102);font-weight:bold;">if</span> <span class="br0" style="color:rgb(0,153,0);">(</span><span class="kw1" style="color:rgb(0,0,102);font-weight:bold;">typeof</span> rights<span class="br0" style="color:rgb(0,153,0);">[</span>user<span class="br0" style="color:rgb(0,153,0);">]</span> <span class="sy0" style="color:rgb(51,153,51);">!=</span> <span class="st0" style="color:rgb(51,102,204);">"undefined"</span><span class="br0" style="color:rgb(0,153,0);">)</span> <span class="br0" style="color:rgb(0,153,0);">{</span>
<span class="co1" style="color:rgb(0,102,0);font-style:italic;">// remove old rights</span>
$<span class="br0" style="color:rgb(0,153,0);">(</span><span class="st0" style="color:rgb(51,102,204);">'.UserProfileMasthead .masthead-info span.tag'</span><span class="br0" style="color:rgb(0,153,0);">)</span>.<span class="me1" style="color:rgb(102,0,102);">remove</span><span class="br0" style="color:rgb(0,153,0);">(</span><span class="br0" style="color:rgb(0,153,0);">)</span><span class="sy0" style="color:rgb(51,153,51);">;</span>
<span class="kw1" style="color:rgb(0,0,102);font-weight:bold;">for</span><span class="br0" style="color:rgb(0,153,0);">(</span> <span class="kw1" style="color:rgb(0,0,102);font-weight:bold;">var</span> i<span class="sy0" style="color:rgb(51,153,51);">=</span><span class="nu0" style="color:rgb(204,0,0);">0</span><span class="sy0" style="color:rgb(51,153,51);">,</span> len<span class="sy0" style="color:rgb(51,153,51);">=</span>rights<span class="br0" style="color:rgb(0,153,0);">[</span>user<span class="br0" style="color:rgb(0,153,0);">]</span>.<span class="me1" style="color:rgb(102,0,102);">length</span><span class="sy0" style="color:rgb(51,153,51);">;</span> i <span class="sy0" style="color:rgb(51,153,51);"><</span> len<span class="sy0" style="color:rgb(51,153,51);">;</span> i<span class="sy0" style="color:rgb(51,153,51);">++</span><span class="br0" style="color:rgb(0,153,0);">)</span> <span class="br0" style="color:rgb(0,153,0);">{</span>
<span class="co1" style="color:rgb(0,102,0);font-style:italic;">// add new rights</span>
$<span class="br0" style="color:rgb(0,153,0);">(</span><span class="st0" style="color:rgb(51,102,204);">'<span class="tag" style="margin-left: 10px !important">'</span> <span class="sy0" style="color:rgb(51,153,51);">+</span> rights<span class="br0" style="color:rgb(0,153,0);">[</span>user<span class="br0" style="color:rgb(0,153,0);">]</span><span class="br0" style="color:rgb(0,153,0);">[</span>i<span class="br0" style="color:rgb(0,153,0);">]</span> <span class="sy0" style="color:rgb(51,153,51);">+</span>
<span class="st0" style="color:rgb(51,102,204);">'</span>'</span><span class="br0" style="color:rgb(0,153,0);">)</span>.<span class="me1" style="color:rgb(102,0,102);">appendTo</span><span class="br0" style="color:rgb(0,153,0);">(</span><span class="st0" style="color:rgb(51,102,204);">'.masthead-info hgroup'</span><span class="br0" style="color:rgb(0,153,0);">)</span><span class="sy0" style="color:rgb(51,153,51);">;</span>
<span class="br0" style="color:rgb(0,153,0);">}</span>
<span class="br0" style="color:rgb(0,153,0);">}</span>
<span class="co1" style="color:rgb(0,102,0);font-style:italic;">// END Script to Remove Old Rights Icons & Insert New</span>
<span class="br0" style="color:rgb(0,153,0);">}</span><span class="sy0" style="color:rgb(51,153,51);">;</span>
$<span class="br0" style="color:rgb(0,153,0);">(</span><span class="kw1" style="color:rgb(0,0,102);font-weight:bold;">function</span><span class="br0" style="color:rgb(0,153,0);">(</span><span class="br0" style="color:rgb(0,153,0);">)</span> <span class="br0" style="color:rgb(0,153,0);">{</span>
<span class="kw1" style="color:rgb(0,0,102);font-weight:bold;">if</span> <span class="br0" style="color:rgb(0,153,0);">(</span>$<span class="br0" style="color:rgb(0,153,0);">(</span><span class="st0" style="color:rgb(51,102,204);">'#UserProfileMasthead'</span><span class="br0" style="color:rgb(0,153,0);">)</span><span class="br0" style="color:rgb(0,153,0);">)</span> <span class="br0" style="color:rgb(0,153,0);">{</span>
addMastheadTags<span class="br0" style="color:rgb(0,153,0);">(</span><span class="br0" style="color:rgb(0,153,0);">)</span><span class="sy0" style="color:rgb(51,153,51);">;</span>
<span class="br0" style="color:rgb(0,153,0);">}</span>
<span class="br0" style="color:rgb(0,153,0);">}</span><span class="br0" style="color:rgb(0,153,0);">)</span><span class="sy0" style="color:rgb(51,153,51);">;</span>
<p>Replace my name with yours in the braketts, and then your title in the second pair of braketts. (its at the top of the code)
</p><p>Number 2, go to your Wiki's "Special:AllMessages?prefix=User-identity-box-group", and rename "Admin" to whatever title you want.
</p>